diff --git a/src/simulation/elements/PSNS.cpp b/src/simulation/elements/PSNS.cpp
index 8e93988fa..f43166048 100644
--- a/src/simulation/elements/PSNS.cpp
+++ b/src/simulation/elements/PSNS.cpp
@@ -48,7 +48,7 @@ Element_PSNS::Element_PSNS()
 int Element_PSNS::update(UPDATE_FUNC_ARGS)
 {
 	int r, rx, ry, rt;
-	if (sim->pv[y/CELL][x/CELL] > parts[i].temp-273.15f)
+	if ((parts[i].tmp == 0 && sim->pv[y/CELL][x/CELL] > parts[i].temp-273.15f) || (parts[i].tmp == 2 && sim->pv[y/CELL][x/CELL] < parts[i].temp-273.15f))
 	{
 		parts[i].life = 0;
 		for (rx = -2; rx <= 2; rx++)
diff --git a/src/simulation/elements/TSNS.cpp b/src/simulation/elements/TSNS.cpp
index 4fd5709bb..ce9fd153a 100644
--- a/src/simulation/elements/TSNS.cpp
+++ b/src/simulation/elements/TSNS.cpp
@@ -83,7 +83,9 @@ int Element_TSNS::update(UPDATE_FUNC_ARGS)
 					r = sim->photons[y+ry][x+rx];
 				if (!r)
 					continue;
-				if (TYP(r) != PT_TSNS && TYP(r) != PT_METL && parts[ID(r)].temp > parts[i].temp)
+				if (parts[i].tmp == 0 && TYP(r) != PT_TSNS && TYP(r) != PT_METL && parts[ID(r)].temp > parts[i].temp)
+					parts[i].life = 1;
+				if (parts[i].tmp == 2 && TYP(r) != PT_TSNS && TYP(r) != PT_METL && parts[ID(r)].temp < parts[i].temp)
 					parts[i].life = 1;
 				if (parts[i].tmp == 1 && TYP(r) != PT_TSNS && TYP(r) != PT_FILT)
 				{