diff --git a/Firmware/variants/MK3-E3DREVO.h b/Firmware/variants/MK3-E3DREVO.h
index 0c023c2c86..6678808734 100644
--- a/Firmware/variants/MK3-E3DREVO.h
+++ b/Firmware/variants/MK3-E3DREVO.h
@@ -319,7 +319,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100
diff --git a/Firmware/variants/MK3-E3DREVO_HF_60W.h b/Firmware/variants/MK3-E3DREVO_HF_60W.h
index c113fd4eb8..6d343a39d0 100644
--- a/Firmware/variants/MK3-E3DREVO_HF_60W.h
+++ b/Firmware/variants/MK3-E3DREVO_HF_60W.h
@@ -319,7 +319,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100
diff --git a/Firmware/variants/MK3.h b/Firmware/variants/MK3.h
index bfbaca9ca6..4b479ba977 100644
--- a/Firmware/variants/MK3.h
+++ b/Firmware/variants/MK3.h
@@ -319,7 +319,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100
diff --git a/Firmware/variants/MK3S-E3DREVO.h b/Firmware/variants/MK3S-E3DREVO.h
index 4066ffde5e..7580bb1889 100644
--- a/Firmware/variants/MK3S-E3DREVO.h
+++ b/Firmware/variants/MK3S-E3DREVO.h
@@ -321,7 +321,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100
diff --git a/Firmware/variants/MK3S-E3DREVO_HF_60W.h b/Firmware/variants/MK3S-E3DREVO_HF_60W.h
index 4acaae79a4..7b7b233e9f 100644
--- a/Firmware/variants/MK3S-E3DREVO_HF_60W.h
+++ b/Firmware/variants/MK3S-E3DREVO_HF_60W.h
@@ -321,7 +321,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100
diff --git a/Firmware/variants/MK3S.h b/Firmware/variants/MK3S.h
index 284354b241..dfafcc5c17 100644
--- a/Firmware/variants/MK3S.h
+++ b/Firmware/variants/MK3S.h
@@ -321,7 +321,7 @@
 #define HEATER_0_MAXTEMP 305
 #endif
 #define BED_MAXTEMP 125
-#define AMBIENT_MAXTEMP 100
+#define AMBIENT_MAXTEMP 80
 
 #if defined(E3D_PT100_EXTRUDER_WITH_AMP) || defined(E3D_PT100_EXTRUDER_NO_AMP)
 // Define PID constants for extruder with PT100