diff --git a/device/celestica/x86_64-cel_e1031-r0/fancontrol b/device/celestica/x86_64-cel_e1031-r0/fancontrol
deleted file mode 100644
index 27c6dcb78e..0000000000
--- a/device/celestica/x86_64-cel_e1031-r0/fancontrol
+++ /dev/null
@@ -1,12 +0,0 @@
-# Configuration file generated by pwmconfig, changes will be lost
-INTERVAL=2
-DEVPATH=hwmon3=devices/pci0000:00/0000:00:13.0/i2c-0/i2c-8/i2c-23/23-004d hwmon2=devices/pci0000:00/0000:00:13.0/i2c-0/i2c-8/i2c-11/11-001a
-DEVNAME=hwmon3=emc2305 hwmon2=max6697
-FCTEMPS=hwmon3/device/pwm1=hwmon2/temp2_input hwmon3/device/pwm2=hwmon2/temp2_input hwmon3/device/pwm4=hwmon2/temp2_input
-FCFANS=hwmon3/device/pwm1=hwmon3/device/fan1_input hwmon3/device/pwm2=hwmon3/device/fan2_input hwmon3/device/pwm4=hwmon3/device/fan4_input
-MINTEMP=hwmon3/device/pwm1=29 hwmon3/device/pwm2=29 hwmon3/device/pwm4=29
-MAXTEMP=hwmon3/device/pwm1=44 hwmon3/device/pwm2=44 hwmon3/device/pwm4=44
-MINSTART=hwmon3/device/pwm1=102 hwmon3/device/pwm2=102 hwmon3/device/pwm4=102
-MINSTOP=hwmon3/device/pwm1=102 hwmon3/device/pwm2=102 hwmon3/device/pwm4=102
-MINPWM=hwmon3/device/pwm1=102 hwmon3/device/pwm2=102 hwmon3/device/pwm4=102
-MAXPWM=hwmon3/device/pwm1=255 hwmon3/device/pwm2=255 hwmon3/device/pwm4=255
diff --git a/device/celestica/x86_64-cel_e1031-r0/fancontrol-B2F b/device/celestica/x86_64-cel_e1031-r0/fancontrol-B2F
new file mode 100644
index 0000000000..7c16892835
--- /dev/null
+++ b/device/celestica/x86_64-cel_e1031-r0/fancontrol-B2F
@@ -0,0 +1,11 @@
+# Configuration file generated by pwmconfig, changes will be lost
+INTERVAL=2
+FCTEMPS=23-004d/pwm1=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp1_input 23-004d/pwm2=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp1_input 23-004d/pwm4=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp1_input
+FCFANS=23-004d/pwm1=23-004d/fan1_input 23-004d/pwm2=23-004d/fan2_input 23-004d/pwm4=23-004d/fan4_input
+MINTEMP=23-004d/pwm1=27 23-004d/pwm2=27 23-004d/pwm4=27
+MAXTEMP=23-004d/pwm1=46 23-004d/pwm2=46 23-004d/pwm4=46
+MINSTART=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MINSTOP=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MINPWM=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MAXPWM=23-004d/pwm1=255 23-004d/pwm2=255 23-004d/pwm4=255
+THYST=23-004d/pwm1=2 23-004d/pwm2=2 23-004d/pwm4=2
diff --git a/device/celestica/x86_64-cel_e1031-r0/fancontrol-F2B b/device/celestica/x86_64-cel_e1031-r0/fancontrol-F2B
new file mode 100644
index 0000000000..a19d510b18
--- /dev/null
+++ b/device/celestica/x86_64-cel_e1031-r0/fancontrol-F2B
@@ -0,0 +1,11 @@
+# Configuration file generated by pwmconfig, changes will be lost
+INTERVAL=2
+FCTEMPS=23-004d/pwm1=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp3_input 23-004d/pwm2=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp3_input 23-004d/pwm4=/sys/bus/i2c/devices/11-001a/hwmon/hwmon*/temp3_input
+FCFANS=23-004d/pwm1=23-004d/fan1_input 23-004d/pwm2=23-004d/fan2_input 23-004d/pwm4=23-004d/fan4_input
+MINTEMP=23-004d/pwm1=29 23-004d/pwm2=29 23-004d/pwm4=29
+MAXTEMP=23-004d/pwm1=46 23-004d/pwm2=46 23-004d/pwm4=46
+MINSTART=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MINSTOP=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MINPWM=23-004d/pwm1=102 23-004d/pwm2=102 23-004d/pwm4=102
+MAXPWM=23-004d/pwm1=255 23-004d/pwm2=255 23-004d/pwm4=255
+THYST=23-004d/pwm1=2 23-004d/pwm2=2 23-004d/pwm4=2
diff --git a/device/celestica/x86_64-cel_e1031-r0/installer.conf b/device/celestica/x86_64-cel_e1031-r0/installer.conf
index 9b49af7808..b158400b22 100644
--- a/device/celestica/x86_64-cel_e1031-r0/installer.conf
+++ b/device/celestica/x86_64-cel_e1031-r0/installer.conf
@@ -1,3 +1,4 @@
 CONSOLE_PORT=0x2f8
 CONSOLE_DEV=1
 CONSOLE_SPEED=9600
+ONIE_PLATFORM_EXTRA_CMDLINE_LINUX="module_blacklist=gpio_ich"
diff --git a/device/celestica/x86_64-cel_seastone-r0/fancontrol b/device/celestica/x86_64-cel_seastone-r0/fancontrol
deleted file mode 100644
index 8d5cbccb9d..0000000000
--- a/device/celestica/x86_64-cel_seastone-r0/fancontrol
+++ /dev/null
@@ -1,12 +0,0 @@
-# Configuration file generated by pwmconfig, changes will be lost
-INTERVAL=10
-DEVPATH=hwmon6=devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e hwmon7=devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d
-DEVNAME=hwmon6=emc2305 hwmon7=emc2305
-FCTEMPS=hwmon6/device/pwm1=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon6/device/pwm2=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon6/device/pwm3=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon6/device/pwm4=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon6/device/pwm5=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon7/device/pwm1=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon7/device/pwm2=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon7/device/pwm3=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon7/device/pwm4=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input hwmon7/device/pwm5=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-5/5-0048/hwmon/hwmon1/temp1_input
-FCFANS=hwmon7/device/pwm5=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d/pwm5 hwmon7/device/pwm4=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d/pwm4 hwmon7/device/pwm3=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d/pwm3 hwmon7/device/pwm2=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d/pwm2 hwmon7/device/pwm1=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-004d/pwm1 hwmon6/device/pwm5=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e/pwm5 hwmon6/device/pwm4=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e/pwm4 hwmon6/device/pwm3=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e/pwm3 hwmon6/device/pwm2=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e/pwm2 hwmon6/device/pwm1=/sys/devices/pci0000:00/0000:00:13.0/i2c-1/i2c-13/13-002e/pwm1
-MINTEMP=hwmon6/device/pwm1=26 hwmon6/device/pwm2=26 hwmon6/device/pwm3=26 hwmon6/device/pwm4=26 hwmon6/device/pwm5=26 hwmon7/device/pwm1=26 hwmon7/device/pwm2=26 hwmon7/device/pwm3=26 hwmon7/device/pwm4=26 hwmon7/device/pwm5=26
-MAXTEMP=hwmon6/device/pwm1=45 hwmon6/device/pwm2=45 hwmon6/device/pwm3=45 hwmon6/device/pwm4=45 hwmon6/device/pwm5=45 hwmon7/device/pwm1=45 hwmon7/device/pwm2=45 hwmon7/device/pwm3=45 hwmon7/device/pwm4=45 hwmon7/device/pwm5=45
-MINSTART=hwmon6/device/pwm1=89 hwmon6/device/pwm2=89 hwmon6/device/pwm3=89 hwmon6/device/pwm4=89 hwmon6/device/pwm5=89 hwmon7/device/pwm1=89 hwmon7/device/pwm2=89 hwmon7/device/pwm3=89 hwmon7/device/pwm4=89 hwmon7/device/pwm5=89
-MINSTOP=hwmon6/device/pwm1=89 hwmon6/device/pwm2=89 hwmon6/device/pwm3=89 hwmon6/device/pwm4=89 hwmon6/device/pwm5=89 hwmon7/device/pwm1=89 hwmon7/device/pwm2=89 hwmon7/device/pwm3=89 hwmon7/device/pwm4=89 hwmon7/device/pwm5=89
-MINPWM=hwmon6/device/pwm1=89 hwmon6/device/pwm2=89 hwmon6/device/pwm3=89 hwmon6/device/pwm4=89 hwmon6/device/pwm5=89 hwmon7/device/pwm1=89 hwmon7/device/pwm2=89 hwmon7/device/pwm3=89 hwmon7/device/pwm4=89 hwmon7/device/pwm5=89
-MAXPWM=hwmon6/device/pwm1=255 hwmon6/device/pwm2=255 hwmon6/device/pwm3=255 hwmon6/device/pwm4=255 hwmon6/device/pwm5=255 hwmon7/device/pwm1=255 hwmon7/device/pwm2=255 hwmon7/device/pwm3=255 hwmon7/device/pwm4=255 hwmon7/device/pwm5=255
diff --git a/device/celestica/x86_64-cel_seastone-r0/fancontrol-B2F b/device/celestica/x86_64-cel_seastone-r0/fancontrol-B2F
new file mode 100644
index 0000000000..61b1c386f3
--- /dev/null
+++ b/device/celestica/x86_64-cel_seastone-r0/fancontrol-B2F
@@ -0,0 +1,13 @@
+# Configuration file generated by pwmconfig, changes will be lost
+INTERVAL=2
+FCTEMPS=13-002e/pwm1=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-002e/pwm2=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-002e/pwm3=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-002e/pwm4=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-002e/pwm5=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-004d/pwm1=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-004d/pwm2=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-004d/pwm3=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-004d/pwm4=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input 13-004d/pwm5=/sys/bus/i2c/devices/15-004e/hwmon/hwmon*/temp1_input
+FCFANS=13-004d/pwm5=13-004d/fan5_input 13-004d/pwm4=13-004d/fan4_input 13-004d/pwm3=13-004d/fan3_input 13-004d/pwm2=13-004d/fan2_input 13-004d/pwm1=13-004d/fan1_input 13-002e/pwm5=13-002e/fan5_input 13-002e/pwm4=13-002e/fan4_input 13-002e/pwm3=13-002e/fan3_input 13-002e/pwm2=13-002e/fan2_input 13-002e/pwm1=13-002e/fan1_input
+MINTEMP=13-002e/pwm1=27 13-002e/pwm2=27 13-002e/pwm3=27 13-002e/pwm4=27 13-002e/pwm5=27 13-004d/pwm1=27 13-004d/pwm2=27 13-004d/pwm3=27 13-004d/pwm4=27 13-004d/pwm5=27
+MAXTEMP=13-002e/pwm1=46 13-002e/pwm2=46 13-002e/pwm3=46 13-002e/pwm4=46 13-002e/pwm5=46 13-004d/pwm1=46 13-004d/pwm2=46 13-004d/pwm3=46 13-004d/pwm4=46 13-004d/pwm5=46
+MINSTART=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MINSTOP=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MINPWM=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MAXPWM=13-002e/pwm1=255 13-002e/pwm2=255 13-002e/pwm3=255 13-002e/pwm4=255 13-002e/pwm5=255 13-004d/pwm1=255 13-004d/pwm2=255 13-004d/pwm3=255 13-004d/pwm4=255 13-004d/pwm5=255
+THYST=13-002e/pwm1=3 13-002e/pwm2=3 13-002e/pwm3=3 13-002e/pwm4=3 13-002e/pwm5=3 13-004d/pwm1=3 13-004d/pwm2=3 13-004d/pwm3=3 13-004d/pwm4=3 13-004d/pwm5=3
+MAXTEMPCRIT=/sys/bus/i2c/devices/7-004a/hwmon/hwmon*/temp1_input=65 /sys/bus/i2c/devices/14-0048/hwmon/hwmon*/temp1_input=75
+MAXTEMPTYPE=/sys/bus/i2c/devices/7-004a/hwmon/hwmon*/temp1_input=ASIC /sys/bus/i2c/devices/14-0048/hwmon/hwmon*/temp1_input=CPU
diff --git a/device/celestica/x86_64-cel_seastone-r0/fancontrol-F2B b/device/celestica/x86_64-cel_seastone-r0/fancontrol-F2B
new file mode 100644
index 0000000000..b851d0a6d6
--- /dev/null
+++ b/device/celestica/x86_64-cel_seastone-r0/fancontrol-F2B
@@ -0,0 +1,13 @@
+# Configuration file generated by pwmconfig, changes will be lost
+INTERVAL=2
+FCTEMPS=13-002e/pwm1=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-002e/pwm2=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-002e/pwm3=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-002e/pwm4=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-002e/pwm5=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-004d/pwm1=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-004d/pwm2=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-004d/pwm3=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-004d/pwm4=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input 13-004d/pwm5=/sys/bus/i2c/devices/5-0048/hwmon/hwmon*/temp1_input
+FCFANS=13-004d/pwm5=13-004d/fan5_input 13-004d/pwm4=13-004d/fan4_input 13-004d/pwm3=13-004d/fan3_input 13-004d/pwm2=13-004d/fan2_input 13-004d/pwm1=13-004d/fan1_input 13-002e/pwm5=13-002e/fan5_input 13-002e/pwm4=13-002e/fan4_input 13-002e/pwm3=13-002e/fan3_input 13-002e/pwm2=13-002e/fan2_input 13-002e/pwm1=13-002e/fan1_input
+MINTEMP=13-002e/pwm1=26 13-002e/pwm2=26 13-002e/pwm3=26 13-002e/pwm4=26 13-002e/pwm5=26 13-004d/pwm1=26 13-004d/pwm2=26 13-004d/pwm3=26 13-004d/pwm4=26 13-004d/pwm5=26
+MAXTEMP=13-002e/pwm1=45 13-002e/pwm2=45 13-002e/pwm3=45 13-002e/pwm4=45 13-002e/pwm5=45 13-004d/pwm1=45 13-004d/pwm2=45 13-004d/pwm3=45 13-004d/pwm4=45 13-004d/pwm5=45
+MINSTART=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MINSTOP=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MINPWM=13-002e/pwm1=89 13-002e/pwm2=89 13-002e/pwm3=89 13-002e/pwm4=89 13-002e/pwm5=89 13-004d/pwm1=89 13-004d/pwm2=89 13-004d/pwm3=89 13-004d/pwm4=89 13-004d/pwm5=89
+MAXPWM=13-002e/pwm1=255 13-002e/pwm2=255 13-002e/pwm3=255 13-002e/pwm4=255 13-002e/pwm5=255 13-004d/pwm1=255 13-004d/pwm2=255 13-004d/pwm3=255 13-004d/pwm4=255 13-004d/pwm5=255
+THYST=13-002e/pwm1=3 13-002e/pwm2=3 13-002e/pwm3=3 13-002e/pwm4=3 13-002e/pwm5=3 13-004d/pwm1=3 13-004d/pwm2=3 13-004d/pwm3=3 13-004d/pwm4=3 13-004d/pwm5=3
+MAXTEMPCRIT=/sys/bus/i2c/devices/7-004a/hwmon/hwmon*/temp1_input=75 /sys/bus/i2c/devices/14-0048/hwmon/hwmon*/temp1_input=75
+MAXTEMPTYPE=/sys/bus/i2c/devices/7-004a/hwmon/hwmon*/temp1_input=ASIC /sys/bus/i2c/devices/14-0048/hwmon/hwmon*/temp1_input=CPU
diff --git a/device/celestica/x86_64-cel_seastone-r0/installer.conf b/device/celestica/x86_64-cel_seastone-r0/installer.conf
index 924e0fb819..bf643a31d4 100644
--- a/device/celestica/x86_64-cel_seastone-r0/installer.conf
+++ b/device/celestica/x86_64-cel_seastone-r0/installer.conf
@@ -1,2 +1,3 @@
 CONSOLE_PORT=0x3f8
 CONSOLE_DEV=0
+ONIE_PLATFORM_EXTRA_CMDLINE_LINUX="module_blacklist=gpio_ich"
diff --git a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.install b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.install
index b88645a922..a36e2cd137 100644
--- a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.install
+++ b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.install
@@ -1,5 +1,8 @@
 dx010/scripts/dx010_check_qsfp.sh usr/local/bin
 dx010/cfg/dx010-modules.conf etc/modules-load.d
 dx010/systemd/platform-modules-dx010.service lib/systemd/system
+dx010/scripts/fancontrol.sh etc/init.d
+dx010/scripts/fancontrol.service lib/systemd/system
+services/fancontrol/fancontrol  usr/local/bin
 dx010/modules/sonic_platform-1.0-py2-none-any.whl usr/share/sonic/device/x86_64-cel_seastone-r0
-services/platform_api/platform_api_mgnt.sh usr/local/bin
\ No newline at end of file
+services/platform_api/platform_api_mgnt.sh usr/local/bin
diff --git a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.postinst b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.postinst
index bf7a120bb8..83be629df5 100644
--- a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.postinst
+++ b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-dx010.postinst
@@ -2,4 +2,7 @@ depmod -a
 systemctl enable platform-modules-dx010.service
 systemctl start platform-modules-dx010.service
 
+systemctl start platform-modules-dx010.service
+systemctl start fancontrol.service
+
 /usr/local/bin/platform_api_mgnt.sh install
diff --git a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.install b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.install
index 93b2eed633..400a593373 100644
--- a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.install
+++ b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.install
@@ -1,2 +1,5 @@
 haliburton/cfg/haliburton-modules.conf etc/modules-load.d
 haliburton/systemd/platform-modules-haliburton.service lib/systemd/system
+haliburton/scripts/fancontrol.sh etc/init.d
+haliburton/scripts/fancontrol.service lib/systemd/system
+services/fancontrol/fancontrol  usr/local/bin
diff --git a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.postinst b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.postinst
index bdc23c66d5..a4ece20d66 100644
--- a/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.postinst
+++ b/platform/broadcom/sonic-platform-modules-cel/debian/platform-modules-haliburton.postinst
@@ -1,3 +1,6 @@
 depmod -a
 systemctl enable platform-modules-haliburton.service
+systemctl enable fancontrol.service
+
 systemctl start platform-modules-haliburton.service
+systemctl start fancontrol.service
diff --git a/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.service b/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.service
new file mode 100755
index 0000000000..25b9f34df2
--- /dev/null
+++ b/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=fan speed regulator
+After=platform-modules-dx010.service
+Before=pmon.service
+
+[Service]
+ExecStart=-/etc/init.d/fancontrol.sh start
+ExecStop=-/etc/init.d/fancontrol.sh stop
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
diff --git a/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.sh b/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.sh
new file mode 100644
index 0000000000..93b1bda428
--- /dev/null
+++ b/platform/broadcom/sonic-platform-modules-cel/dx010/scripts/fancontrol.sh
@@ -0,0 +1,80 @@
+#! /bin/sh
+
+### BEGIN INIT INFO
+# Provides:          fancontrol
+# Required-Start:    $remote_fs
+# Required-Stop:     $remote_fs
+# Default-Start:     2 3 4 5
+# Default-Stop:
+# Short-Description: fancontrol
+# Description:       fan speed regulator
+### END INIT INFO
+
+. /lib/lsb/init-functions
+
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
+DAEMON=/usr/local/bin/fancontrol
+DESC="fan speed regulator"
+NAME="fancontrol"
+PIDFILE=/var/run/fancontrol.pid
+MAIN_CONF=/usr/share/sonic/device/x86_64-cel_seastone-r0/fancontrol
+DEVPATH=/sys/devices/pci0000:00/0000:00:13.0/i2c-*/i2c-13/13-002e
+GPIO_DIR=/sys/class/gpio
+BASE_GPIO=$(find $GPIO_DIR | grep gpiochip | grep -o '[[:digit:]]*')
+DIRGPIO_START=15
+
+test -x $DAEMON || exit 0
+
+for i in 1 2 3 4 5; do
+    FANFAULT=$(cat ${DEVPATH}/fan${i}_fault)
+    [ $FANFAULT = 1 ] && continue
+    FANDIR_GPIO_NUMBER=$((DIRGPIO_START + BASE_GPIO))
+    FANDIR_VALUE=$(cat ${GPIO_DIR}/gpio${FANDIR_GPIO_NUMBER}/value)
+    DIRGPIO_START=$((DIRGPIO_START + 1))
+    FANDIR=$([ $FANDIR_VALUE = 1 ] && echo "B2F" || echo "F2B")
+done
+CONF=${MAIN_CONF}-${FANDIR}
+
+case "$1" in
+start)
+    if [ -f $CONF ]; then
+        if $DAEMON --check $CONF 1>/dev/null 2>/dev/null; then
+            log_daemon_msg "Starting $DESC" "$NAME\n"
+            start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON $CONF
+            log_end_msg $?
+        else
+            log_failure_msg "Not starting fancontrol, broken configuration file; please re-run pwmconfig."
+        fi
+    else
+        if [ "$VERBOSE" != no ]; then
+            log_warning_msg "Not starting fancontrol; run pwmconfig first."
+        fi
+    fi
+    ;;
+stop)
+    log_daemon_msg "Stopping $DESC" "$NAME"
+    start-stop-daemon --stop --quiet --pidfile $PIDFILE --oknodo --startas $DAEMON $CONF
+    rm -f $PIDFILE
+    log_end_msg $?
+    ;;
+restart)
+    $0 stop
+    sleep 3
+    $0 start
+    ;;
+force-reload)
+    if start-stop-daemon --stop --test --quiet --pidfile $PIDFILE --startas $DAEMON $CONF; then
+        $0 restart
+    fi
+    ;;
+status)
+    status_of_proc $DAEMON $NAME $CONF && exit 0 || exit $?
+    ;;
+*)
+    log_success_msg "Usage: /etc/init.d/fancontrol {start|stop|restart|force-reload|status}"
+    exit 1
+    ;;
+esac
+
+exit 0
diff --git a/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.service b/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.service
new file mode 100755
index 0000000000..bda5416700
--- /dev/null
+++ b/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.service
@@ -0,0 +1,12 @@
+[Unit]
+Description=fan speed regulator
+After=platform-modules-haliburton.service
+Before=pmon.service
+
+[Service]
+ExecStart=-/etc/init.d/fancontrol.sh start
+ExecStop=-/etc/init.d/fancontrol.sh stop
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
diff --git a/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.sh b/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.sh
new file mode 100755
index 0000000000..f4275ad5c9
--- /dev/null
+++ b/platform/broadcom/sonic-platform-modules-cel/haliburton/scripts/fancontrol.sh
@@ -0,0 +1,77 @@
+#! /bin/sh
+
+### BEGIN INIT INFO
+# Provides:          fancontrol
+# Required-Start:    $remote_fs
+# Required-Stop:     $remote_fs
+# Default-Start:     2 3 4 5
+# Default-Stop:
+# Short-Description: fancontrol
+# Description:       fan speed regulator
+### END INIT INFO
+
+. /lib/lsb/init-functions
+
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/local/bin
+DAEMON=/usr/local/bin/fancontrol
+DESC="fan speed regulator"
+NAME="fancontrol"
+PIDFILE=/var/run/fancontrol.pid
+PLATFORMPATH=/sys/devices/platform/e1031.smc
+MAIN_CONF=/usr/share/sonic/device/x86_64-cel_e1031-r0/fancontrol
+DEVPATH=/sys/devices/pci0000:00/0000:00:13.0/i2c-0/i2c-8/i2c-23/23-004d
+
+test -x $DAEMON || exit 0
+
+for i in 1 2 3; do
+    j=$i
+    [ $i -eq 3 ] && j=4
+    FANFAULT=$(cat ${DEVPATH}/fan${j}_fault)
+    [ $FANFAULT = 1 ] && continue
+    FANDIR=$(cat ${PLATFORMPATH}/fan${i}_dir)
+done
+CONF=${MAIN_CONF}-${FANDIR}
+
+case "$1" in
+start)
+    if [ -f $CONF ]; then
+        if $DAEMON --check $CONF 1>/dev/null 2>/dev/null; then
+            log_daemon_msg "Starting $DESC" "$NAME\n"
+            start-stop-daemon --start --quiet --pidfile $PIDFILE --startas $DAEMON $CONF
+            log_end_msg $?
+        else
+            log_failure_msg "Not starting fancontrol, broken configuration file; please re-run pwmconfig."
+        fi
+    else
+        if [ "$VERBOSE" != no ]; then
+            log_warning_msg "Not starting fancontrol; run pwmconfig first."
+        fi
+    fi
+    ;;
+stop)
+    log_daemon_msg "Stopping $DESC" "$NAME"
+    start-stop-daemon --stop --quiet --pidfile $PIDFILE --oknodo --startas $DAEMON $CONF
+    rm -f $PIDFILE
+    log_end_msg $?
+    ;;
+restart)
+    $0 stop
+    sleep 3
+    $0 start
+    ;;
+force-reload)
+    if start-stop-daemon --stop --test --quiet --pidfile $PIDFILE --startas $DAEMON $CONF; then
+        $0 restart
+    fi
+    ;;
+status)
+    status_of_proc $DAEMON $NAME $CONF && exit 0 || exit $?
+    ;;
+*)
+    log_success_msg "Usage: /etc/init.d/fancontrol {start|stop|restart|force-reload|status}"
+    exit 1
+    ;;
+esac
+
+exit 0
diff --git a/platform/broadcom/sonic-platform-modules-cel/services/fancontrol/fancontrol b/platform/broadcom/sonic-platform-modules-cel/services/fancontrol/fancontrol
new file mode 100755
index 0000000000..b365d76e2a
--- /dev/null
+++ b/platform/broadcom/sonic-platform-modules-cel/services/fancontrol/fancontrol
@@ -0,0 +1,662 @@
+#!/bin/bash
+#
+# Simple script implementing a temperature dependent fan speed control
+# Supported Linux kernel versions: 2.6.5 and later
+#
+# Version 0.70
+#
+# Usage: fancontrol [CONFIGFILE]
+#
+# Dependencies:
+#   bash, egrep, sed, cut, sleep, readlink, lm_sensors :)
+#
+# Please send any questions, comments or success stories to
+# marius.reiner@hdev.de
+# Thanks!
+#
+# For configuration instructions and warnings please see fancontrol.txt, which
+# can be found in the doc/ directory or at the website mentioned above.
+#
+#
+#    Copyright 2003 Marius Reiner <marius.reiner@hdev.de>
+#    Copyright (C) 2007-2009 Jean Delvare <khali@linux-fr.org>
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+#    MA 02110-1301 USA.
+#
+#
+
+PIDFILE="/var/run/fancontrol.pid"
+THERMAL_OVERLOAD_CONTROL_FILE="/usr/local/bin/thermal_overload_control.sh"
+
+#DEBUG=1
+MAX=255
+
+function LoadConfig
+{
+    local fcvcount fcv
+
+    echo "Loading configuration from $1 ..."
+    if [ ! -r "$1" ]
+    then
+        echo "Error: Can't read configuration file" >&2
+        exit 1
+    fi
+
+    # grep configuration from file
+    INTERVAL=`egrep '^INTERVAL=.*$' $1 | sed -e 's/INTERVAL=//g'`
+    DEVPATH=`egrep '^DEVPATH=.*$' $1 | sed -e 's/DEVPATH= *//g'`
+    DEVNAME=`egrep '^DEVNAME=.*$' $1 | sed -e 's/DEVNAME= *//g'`
+    FCTEMPS=`egrep '^FCTEMPS=.*$' $1 | sed -e 's/FCTEMPS=//g'`
+    MINTEMP=`egrep '^MINTEMP=.*$' $1 | sed -e 's/MINTEMP=//g'`
+    MAXTEMP=`egrep '^MAXTEMP=.*$' $1 | sed -e 's/MAXTEMP=//g'`
+    MINSTART=`egrep '^MINSTART=.*$' $1 | sed -e 's/MINSTART=//g'`
+    MINSTOP=`egrep '^MINSTOP=.*$' $1 | sed -e 's/MINSTOP=//g'`
+    # optional settings:
+    FCFANS=`egrep '^FCFANS=.*$' $1 | sed -e 's/FCFANS=//g'`
+    MINPWM=`egrep '^MINPWM=.*$' $1 | sed -e 's/MINPWM=//g'`
+    MAXPWM=`egrep '^MAXPWM=.*$' $1 | sed -e 's/MAXPWM=//g'`
+    THYST=`egrep '^THYST=.*$' $1 | sed -e 's/THYST=//g'`
+    MAXTEMPCRIT=`egrep '^MAXTEMPCRIT=.*$' $1 | sed -e 's/MAXTEMPCRIT=//g'`
+    MAXTEMPTYPE=`egrep '^MAXTEMPTYPE=.*$' $1 | sed -e 's/MAXTEMPTYPE=//g'`
+    echo 
+    # Check whether all mandatory settings are set
+    if [[ -z ${INTERVAL} || -z ${FCTEMPS} || -z ${MINTEMP} || -z ${MAXTEMP} || -z ${MINSTART} || -z ${MINSTOP} ]]
+    then
+        echo "Some mandatory settings missing, please check your config file!" >&2
+        exit 1
+    fi
+    if [ "$INTERVAL" -le 0 ]
+    then
+        echo "Error in configuration file:" >&2
+        echo "INTERVAL must be at least 1" >&2
+        exit 1
+    fi
+
+    # write settings to arrays for easier use and print them
+    echo
+    echo "Common settings:"
+    echo "  INTERVAL=$INTERVAL"
+
+    let fcvcount=0
+    for fcv in $FCTEMPS
+    do
+        if ! echo $fcv | egrep -q '='
+        then
+            echo "Error in configuration file:" >&2
+            echo "FCTEMPS value is improperly formatted" >&2
+            exit 1
+        fi
+
+        AFCPWM[$fcvcount]=`echo $fcv |cut -d'=' -f1`
+        AFCTEMP[$fcvcount]=`echo $fcv |cut -d'=' -f2`
+        AFCFAN[$fcvcount]=`echo $FCFANS |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        AFCFANFAULT[$fcvcount]=`echo "${AFCFAN[$fcvcount]}" |sed -e 's/input/fault/g'`
+        AFCMINTEMP[$fcvcount]=`echo $MINTEMP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        AFCMAXTEMP[$fcvcount]=`echo $MAXTEMP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        AFCMINSTART[$fcvcount]=`echo $MINSTART |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        AFCMINSTOP[$fcvcount]=`echo $MINSTOP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        AFCMINPWM[$fcvcount]=`echo $MINPWM |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        [ -z "${AFCMINPWM[$fcvcount]}" ] && AFCMINPWM[$fcvcount]=0
+        AFCMAXPWM[$fcvcount]=`echo $MAXPWM |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        [ -z "${AFCMAXPWM[$fcvcount]}" ] && AFCMAXPWM[$fcvcount]=255
+        AFCTHYST[$fcvcount]=`echo $THYST |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
+        [ -z "${AFCTHYST[$fcvcount]}" ] && AFCTHYST[$fcvcount]=0
+
+        # verify the validity of the settings
+        if [ "${AFCMINTEMP[$fcvcount]}" -ge "${AFCMAXTEMP[$fcvcount]}" ]
+        then
+            echo "Error in configuration file (${AFCPWM[$fcvcount]}):" >&2
+            echo "MINTEMP must be less than MAXTEMP" >&2
+            exit 1
+        fi
+        if [ "${AFCMAXPWM[$fcvcount]}" -gt 255 ]
+        then
+            echo "Error in configuration file (${AFCPWM[$fcvcount]}):" >&2
+            echo "MAXPWM must be at most 255" >&2
+            exit 1
+        fi
+        if [ "${AFCMINSTOP[$fcvcount]}" -ge "${AFCMAXPWM[$fcvcount]}" ]
+        then
+            echo "Error in configuration file (${AFCPWM[$fcvcount]}):" >&2
+            echo "MINSTOP must be less than MAXPWM" >&2
+            exit 1
+        fi
+        if [ "${AFCMINSTOP[$fcvcount]}" -lt "${AFCMINPWM[$fcvcount]}" ]
+        then
+            echo "Error in configuration file (${AFCPWM[$fcvcount]}):" >&2
+            echo "MINSTOP must be greater than or equal to MINPWM" >&2
+            exit 1
+        fi
+        if [ "${AFCMINPWM[$fcvcount]}" -lt 0 ]
+        then
+            echo "Error in configuration file (${AFCPWM[$fcvcount]}):" >&2
+            echo "MINPWM must be at least 0" >&2
+            exit 1
+        fi
+
+        echo
+        echo "Settings for ${AFCPWM[$fcvcount]}:"
+        echo "  Depends on ${AFCTEMP[$fcvcount]}"
+        echo "  Controls ${AFCFAN[$fcvcount]}"
+        echo "  MINTEMP=${AFCMINTEMP[$fcvcount]}"
+        echo "  MAXTEMP=${AFCMAXTEMP[$fcvcount]}"
+        echo "  MINSTART=${AFCMINSTART[$fcvcount]}"
+        echo "  MINSTOP=${AFCMINSTOP[$fcvcount]}"
+        echo "  MINPWM=${AFCMINPWM[$fcvcount]}"
+        echo "  MAXPWM=${AFCMAXPWM[$fcvcount]}"
+        echo "  THYST=${AFCTHYST[$fcvcount]}"
+        let fcvcount=fcvcount+1
+    done
+    echo
+
+
+    let tscount=0
+    for ts in $MAXTEMPCRIT
+    do
+        CSTEMP[$tscount]=`echo $ts | cut -d '=' -f1`
+        CSMAXTEMPCRIT[$tscount]=`echo $ts | cut -d '=' -f2`
+        CSMAXTEMPTYPE=($(echo $MAXTEMPTYPE |sed -e 's/ /\n/g'| cut -d'=' -f2))
+
+        echo
+        echo "Settings for ${CSMAXTEMPTYPE[$tscount]} temperature sensor:"
+        echo "  Depends on ${CSTEMP[$tscount]}"
+        echo "  MAXTEMPCRIT=${CSMAXTEMPCRIT[$tscount]}"
+        let tscount=tscount+1q
+    done
+    echo
+
+}
+
+function CheckFanFault()
+{
+    let fancount=0
+    while (( $fancount < ${#AFCFANFAULT[@]} )) # go through all fan fault.
+    do
+        fault=`cat ${AFCFANFAULT[$fancount]}`
+        if [[ "$fault" == "1" ]]
+        then
+            return 1 # fan fault detected
+        fi
+        let fancount=$fancount+1
+    done
+    return 0
+}
+
+function CheckTempOver()
+{
+    let tempcount=0
+    while (( $tempcount < ${#CSTEMP[@]} )) # go through all temp.
+    do
+        ctemp=`cat ${CSTEMP[$tempcount]}`
+        let maxcrit="${CSMAXTEMPCRIT[$tempcount]}*1000"
+        if [ $ctemp -ge $maxcrit ]
+        then
+            logger "Thermal overload : ${CSMAXTEMPTYPE[$tempcount]} temperature ${ctemp} > ${maxcrit}"
+            if [ -f "$THERMAL_OVERLOAD_CONTROL_FILE" ]
+            then
+                toc_cmd="${THERMAL_OVERLOAD_CONTROL_FILE} ${CSMAXTEMPTYPE[$tempcount],,}"
+                bash $toc_cmd
+                exit 1
+            fi
+        fi
+        let tempcount=$tempcount+1
+    done
+    return 0
+}
+
+function DevicePath()
+{
+    if [ -h "$1/device" ]
+    then
+        readlink -f "$1/device" | sed -e 's/^\/sys\///'
+    fi
+}
+
+function DeviceName()
+{
+    if [ -r "$1/name" ]
+    then
+        cat "$1/name" | sed -e 's/[[:space:]=]/_/g'
+    elif [ -r "$1/device/name" ]
+    then
+        cat "$1/device/name" | sed -e 's/[[:space:]=]/_/g'
+    fi
+}
+
+function ValidateDevices()
+{
+    local OLD_DEVPATH="$1" OLD_DEVNAME="$2" outdated=0
+    local entry device name path
+
+    for entry in $OLD_DEVPATH
+    do
+        device=`echo "$entry" | sed -e 's/=[^=]*$//'`
+        path=`echo "$entry" | sed -e 's/^[^=]*=//'`
+
+        if [ "`DevicePath "$device"`" != "$path" ]
+        then
+            echo "Device path of $device has changed" >&2
+            outdated=1
+        fi
+    done
+
+    for entry in $OLD_DEVNAME
+    do
+        device=`echo "$entry" | sed -e 's/=[^=]*$//'`
+        name=`echo "$entry" | sed -e 's/^[^=]*=//'`
+
+        if [ "`DeviceName "$device"`" != "$name" ]
+        then
+            echo "Device name of $device has changed" >&2
+            outdated=1
+        fi
+    done
+
+    return $outdated
+}
+
+# Check that all referenced sysfs files exist
+function CheckFiles
+{
+    local outdated=0 fcvcount pwmo tsen fan
+
+    let fcvcount=0
+    while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
+    do
+        pwmo=${AFCPWM[$fcvcount]}
+        if [ ! -w $pwmo ]
+        then
+            echo "Error: file $pwmo doesn't exist" >&2
+            outdated=1
+        fi
+        let fcvcount=$fcvcount+1
+    done
+
+    let fcvcount=0
+    while (( $fcvcount < ${#AFCTEMP[@]} )) # go through all temp inputs
+    do
+        tsen=${AFCTEMP[$fcvcount]}
+        if [ ! -r $tsen ]
+        then
+            echo "Error: file $tsen doesn't exist" >&2
+            outdated=1
+        fi
+        let fcvcount=$fcvcount+1
+    done
+
+    let fcvcount=0
+    while (( $fcvcount < ${#AFCFAN[@]} )) # go through all fan inputs
+    do
+        # A given PWM output can control several fans
+        for fan in $(echo ${AFCFAN[$fcvcount]} | sed -e 's/+/ /')
+        do
+            if [ ! -r $fan ]
+            then
+                echo "Error: file $fan doesn't exist" >&2
+                outdated=1
+            fi
+        done
+        let fcvcount=$fcvcount+1
+    done
+
+    if [ $outdated -eq 1 ]
+    then
+        echo >&2
+        echo "At least one referenced file is missing. Either some required kernel" >&2
+        echo "modules haven't been loaded, or your configuration file is outdated." >&2
+        echo "In the latter case, you should run pwmconfig again." >&2
+    fi
+
+    return $outdated
+}
+
+if [ "$1" == "--check" ]
+then
+    if [ -f "$2" ]
+    then
+        LoadConfig $2
+    else
+        LoadConfig /etc/fancontrol
+    fi
+    exit 0
+fi
+
+if [ -f "$1" ]
+then
+    LoadConfig $1
+else
+    LoadConfig /etc/fancontrol
+fi
+
+# Detect path to sensors
+if echo "${AFCPWM[0]}" | egrep -q '^/'
+then
+    DIR=/
+elif echo "${AFCPWM[0]}" | egrep -q '^hwmon[0-9]'
+then
+    DIR=/sys/class/hwmon
+elif echo "${AFCPWM[0]}" | egrep -q '^[1-9]*[0-9]-[0-9abcdef]{4}'
+then
+    DIR=/sys/bus/i2c/devices
+else
+    echo "$0: Invalid path to sensors" >&2
+    exit 1
+fi
+
+if [ ! -d $DIR ]
+then
+    echo $0: 'No sensors found! (did you load the necessary modules?)' >&2
+    exit 1
+fi
+cd $DIR
+
+# Check for configuration change
+# if [ "$DIR" != "/" ] && [ -z "$DEVPATH" -o -z "$DEVNAME" ]
+# then
+#    echo "Configuration is too old, please run pwmconfig again" >&2
+#      exit 1
+# fi
+
+if [ "$DIR" = "/" -a -n "$DEVPATH" ]
+then
+    echo "Unneeded DEVPATH with absolute device paths" >&2
+    exit 1
+fi
+if ! ValidateDevices "$DEVPATH" "$DEVNAME"
+then
+    echo "Configuration appears to be outdated, please run pwmconfig again" >&2
+    exit 1
+fi
+CheckFiles || exit 1
+
+if [ -f "$PIDFILE" ]
+then
+    echo "File $PIDFILE exists, is fancontrol already running?" >&2
+    exit 1
+fi
+echo $$ > "$PIDFILE"
+
+# $1 = pwm file name
+function pwmdisable()
+{
+    local ENABLE=${1}_enable
+
+    # No enable file? Just set to max
+    if [ ! -f $ENABLE ]
+    then
+        echo $MAX > $1
+        return 0
+    fi
+
+    # Try pwmN_enable=0
+    echo 0 > $ENABLE 2> /dev/null
+    if [ `cat $ENABLE` -eq 0 ]
+    then
+        # Success
+        echo $MAX > $1
+        return 0
+    fi
+
+    # It didn't work, try pwmN_enable=1 pwmN=255
+    echo 1 > $ENABLE 2> /dev/null
+    echo $MAX > $1
+    if [ `cat $ENABLE` -eq 1 -a `cat $1` -ge 190 ]
+    then
+        # Success
+        return 0
+    fi
+
+    # Nothing worked
+    echo "$ENABLE stuck to" `cat $ENABLE` >&2
+    return 1
+}
+
+# $1 = pwm file name
+function pwmenable()
+{
+    local ENABLE=${1}_enable
+
+    if [ -f $ENABLE ]
+    then
+        echo 1 > $ENABLE 2> /dev/null
+        if [ $? -ne 0 ]
+        then
+            return 1
+        fi
+    fi
+    echo $MAX > $1
+}
+
+function restorefans()
+{
+    local status=$1 fcvcount pwmo
+
+    echo 'Aborting, restoring fans...'
+    let fcvcount=0
+    while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
+    do
+        pwmo=${AFCPWM[$fcvcount]}
+        pwmdisable $pwmo
+        let fcvcount=$fcvcount+1
+    done
+    echo 'Verify fans have returned to full speed'
+    rm -f "$PIDFILE"
+    exit $status
+}
+
+trap 'restorefans 0' SIGQUIT SIGTERM
+trap 'restorefans 1' SIGHUP SIGINT
+
+function upperBound
+{
+    # $1: temperature
+    # $2: Tmin
+    # $3: Tmax
+    # $4: MinPWM
+    # $5: MaxPWM
+    # $6 Thyst
+    # upper_bound = (temperature-Tmin+2) * (MaxPWM-MinPWM)/(Tmax-Tmin)+MinPWM
+    let a="($1-$2+$6)*($5-$4)/($3-$2)+$4"
+    up_b=$a
+}
+function lowerBound
+{
+    # $1: temperature
+    # $2: Tmin
+    # $3: Tmax
+    # $4: MinPWM
+    # $5: MaxPWM
+    # $6 Thyst
+    # lower_bound = (temperature-Tmin) *(MaxPWM-MinPWM)/(Tmax-Tmin)+MinPWM
+    let a="($1-$2)*($5-$4)/($3-$2)+$4"
+    lw_b=$a
+}
+
+# main function
+function UpdateFanSpeeds
+{
+    local fcvcount
+    local pwmo tsens fan mint maxt minsa minso minpwm maxpwm tHyst
+    local tval pwmpval fanval min_fanval one_fan one_fanval
+    local -i pwmval
+
+    let fcvcount=0
+    while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
+    do
+        #hopefully shorter vars will improve readability:
+        pwmo=${AFCPWM[$fcvcount]}
+        tsens=${AFCTEMP[$fcvcount]}
+        fan=${AFCFAN[$fcvcount]}
+        let mint="${AFCMINTEMP[$fcvcount]}*1000"
+        let maxt="${AFCMAXTEMP[$fcvcount]}*1000"
+        minsa=${AFCMINSTART[$fcvcount]}
+        minso=${AFCMINSTOP[$fcvcount]}
+        minpwm=${AFCMINPWM[$fcvcount]}
+        maxpwm=${AFCMAXPWM[$fcvcount]}
+        let tHyst="${AFCTHYST[$fcvcount]}*1000"
+
+        #if some fan fault detected all pwm=100%
+        CheckFanFault
+        if [ $? -ne 0 ]
+        then
+            echo $MAX > $pwmo
+            let fcvcount=$fcvcount+1
+            continue
+        fi
+
+		#check thermal overload
+        CheckTempOver
+
+        read tval < ${tsens}
+        if [ $? -ne 0 ]
+        then
+            echo "Error reading temperature from $DIR/$tsens"
+            restorefans 1
+        fi
+
+        read pwmpval < ${pwmo}
+        if [ $? -ne 0 ]
+        then
+            echo "Error reading PWM value from $DIR/$pwmo"
+            restorefans 1
+        fi
+
+        # If fanspeed-sensor output shall be used, do it
+        if [[ -n ${fan} ]]
+        then
+            min_fanval=100000
+            fanval=
+            # A given PWM output can control several fans
+            for one_fan in $(echo $fan | sed -e 's/+/ /')
+            do
+                read one_fanval < ${one_fan}
+                if [ $? -ne 0 ]
+                then
+                    echo "Error reading Fan value from $DIR/$one_fan" >&2
+                    restorefans 1
+                fi
+
+                # Remember the minimum, it only matters if it is 0
+                if [ $one_fanval -lt $min_fanval ]
+                then
+                    min_fanval=$one_fanval
+                fi
+
+                if [ -z "$fanval" ]
+                then
+                    fanval=$one_fanval
+                else
+                    fanval="$fanval/$one_fanval"
+                fi
+            done
+        else
+            fanval=1  # set it to a non zero value, so the rest of the script still works
+        fi
+
+        # debug info
+        if [ "$DEBUG" != "" ]
+        then
+            echo "pwmo=$pwmo"
+            echo "tsens=$tsens"
+            echo "fan=$fan"
+            echo "mint=$mint"
+            echo "maxt=$maxt"
+            echo "minsa=$minsa"
+            echo "minso=$minso"
+            echo "minpwm=$minpwm"
+            echo "maxpwm=$maxpwm"
+            echo "tval=$tval"
+            echo "pwmpval=$pwmpval"
+            echo "fanval=$fanval"
+            echo "min_fanval=$min_fanval"
+            echo "tHyst=$tHyst"
+        fi
+        pwmval=$pwmpval
+        if (( $tval+$tHyst <= $mint ))
+            then pwmval=$minpwm # below min temp, use defined min pwm
+        elif (( $tval >= $maxt ))
+            then pwmval=$maxpwm # over max temp, use defined max pwm
+        elif (( $tval+$tHyst >= $maxt )) && (( $pwmpval == $maxpwm ))
+            then pwmval=$maxpwm
+        else
+            # calculate the new value from temperature and settings
+            # pwmval="(${tval}-${mint})*(${maxpwm}-${minso})/(${maxt}-${mint})+${minso}
+            lowerBound ${tval} ${mint} ${maxt} ${minpwm} ${maxpwm} ${tHyst}
+            lb=$lw_b
+            upperBound ${tval} ${mint} ${maxt} ${minpwm} ${maxpwm} ${tHyst}
+            ub=$up_b
+
+            if [ "$DEBUG" != "" ]
+            then
+                echo "old pwm=$pwmval lw_b=$lw_b up_b=$up_b"
+            fi
+
+            if [[ "$pwmval" -gt "$ub" ]]
+            then
+                pwmval=$ub
+            else
+                if [[ "$pwmval" -lt "$lb" ]]
+                then
+                        pwmval=$lb
+                fi
+            fi
+
+            if [ $pwmpval -eq 0 -o $min_fanval -eq 0 ]
+            then # if fan was stopped start it using a safe value
+                echo $minsa > $pwmo
+                # Sleep while still handling signals
+                sleep 1 &
+                wait $!
+            fi
+        fi
+        echo $pwmval > $pwmo # write new value to pwm output
+        if [ $? -ne 0 ]
+        then
+            echo "Error writing PWM value to $DIR/$pwmo" >&2
+            restorefans 1
+        fi
+        if [ "$DEBUG" != "" ]
+        then
+            echo "new pwmval=$pwmval"
+        fi
+        let fcvcount=$fcvcount+1
+    done
+}
+
+echo 'Enabling PWM on fans...'
+let fcvcount=0
+while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
+do
+    pwmo=${AFCPWM[$fcvcount]}
+    pwmenable $pwmo
+    if [ $? -ne 0 ]
+    then
+        echo "Error enabling PWM on $DIR/$pwmo" >&2
+        restorefans 1
+    fi
+    let fcvcount=$fcvcount+1
+done
+
+echo 'Starting automatic fan control...'
+
+# main loop calling the main function at specified intervals
+while true
+do
+    UpdateFanSpeeds
+    # Sleep while still handling signals
+    sleep $INTERVAL &
+    wait $!
+done