diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 38bb61c5c..74c03eb04 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -19,6 +19,7 @@
 // Gen7 custom (Alfons3 Version) = 10 "https://github.com/Alfons3/Generation_7_Electronics"
 // Gen7 v1.1, v1.2 = 11
 // Gen7 v1.3 = 12
+// Gen7 v1.4 = 13
 // MEGA/RAMPS up to 1.2 = 3
 // RAMPS 1.3 = 33 (Power outputs: Extruder, Bed, Fan)
 // RAMPS 1.3 = 34 (Power outputs: Extruder0, Extruder1, Bed)
diff --git a/Marlin/pins.h b/Marlin/pins.h
index 45cbebf00..fb809ce58 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -45,13 +45,19 @@
 #endif /* 99 */
 
 /****************************************************************************************
-* Gen7 v1.1, v1.2, v1.3 pin assignment
+* Gen7 v1.1, v1.2, v1.3, v1.4 pin assignment
 *
 ****************************************************************************************/
 
+
+#if MOTHERBOARD == 13
+#define MOTHERBOARD 11
+#define GEN7_VERSION 14 // v1.4
+#endif
+
 #if MOTHERBOARD == 12
 #define MOTHERBOARD 11
-#define GEN7_V_1_3
+#define GEN7_VERSION 13 // v1.3
 #endif
 
 #if MOTHERBOARD == 11
@@ -62,6 +68,10 @@
 
 #endif
 
+#ifndef GEN7_VERSION
+#define GEN7_VERSION 12 // v1.x
+#endif
+
 //x axis pins
 #define X_STEP_PIN 19
 #define X_DIR_PIN 18
@@ -103,7 +113,7 @@
 #define SDSS -1 // SCL pin of I2C header
 #define LED_PIN -1
 
-#ifdef GEN7_V_1_3
+#if (GEN7_VERSION >= 13)
 // Gen7 v1.3 removed the fan pin
 #define FAN_PIN -1
 #else
@@ -111,6 +121,12 @@
 #endif
 #define PS_ON_PIN 15
 
+#if (GEN7_VERSION < 14)
+// Gen 1.3 and earlier supplied thermistor power via PS_ON
+// Need to ignore the bad thermistor readings on those units
+#define BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
+#endif
+
 //our pin for debugging.
 #define DEBUG_PIN 0
 
diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 6efbbd1d9..069674be9 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -851,7 +851,7 @@ ISR(TIMER0_COMPB_vect)
     for(unsigned char e = 0; e < EXTRUDERS; e++) {
        if(current_raw[e] >= maxttemp[e]) {
           target_raw[e] = 0;
-          #if (PS_ON != -1)
+          #ifndef BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
           {
             max_temp_error(e);
             kill();;
@@ -860,7 +860,7 @@ ISR(TIMER0_COMPB_vect)
        }
        if(current_raw[e] <= minttemp[e]) {
           target_raw[e] = 0;
-          #if (PS_ON != -1)
+          #ifndef BOGUS_TEMPERATURE_FAILSAFE_OVERRIDE
           {
             min_temp_error(e);
             kill();