Additional fixes to temperature.cpp and found another missing line

Looks like INVERT_E3_DIR was missing in the configuration.h also as I
did a test compile with 4 extruders and Azteeg X3 Pro defined. So I also
added those lines too. Additional formatting to make the comments line
up better in that section.

Marlin/Configuration.h

@@ -344,12 +344,13 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_E false // For all extruders
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
-#define INVERT_X_DIR true    // for Mendel set to false, for Orca set to true
+#define INVERT_X_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/Hephestos/Configuration.h

@@ -354,8 +354,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/K8200/Configuration.h

@@ -360,10 +360,11 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
-#define INVERT_Z_DIR false     // for Mendel set to false, for Orca set to true
+#define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR true    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/SCARA/Configuration.h

@@ -383,8 +383,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstop	s when homing; 1=MAX, -1=MIN

Marlin/example_configurations/WITBOX/Configuration.h

@@ -354,12 +354,13 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_E false // For all extruders
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
-#define INVERT_X_DIR true    // for Mendel set to false, for Orca set to true
+#define INVERT_X_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR true     // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/delta/Configuration.h

@@ -371,8 +371,9 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_Z_DIR false
 
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/makibox/Configuration.h

@@ -355,9 +355,10 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_Y_DIR false    // for Mendel set to true, for Orca set to false
 #define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
-#define INVERT_E0_DIR true   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E0_DIR true    // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/example_configurations/tvrrug/Round2/Configuration.h

@@ -356,11 +356,12 @@ const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of
 #define DISABLE_INACTIVE_EXTRUDER true //disable only inactive extruders and keep active extruder enabled
 
 #define INVERT_X_DIR false    // for Mendel set to false, for Orca set to true
-#define INVERT_Y_DIR true    // for Mendel set to true, for Orca set to false
+#define INVERT_Y_DIR true     // for Mendel set to true, for Orca set to false
-#define INVERT_Z_DIR false     // for Mendel set to false, for Orca set to true
+#define INVERT_Z_DIR false    // for Mendel set to false, for Orca set to true
 #define INVERT_E0_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
-#define INVERT_E1_DIR false    // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E1_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 #define INVERT_E2_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
+#define INVERT_E3_DIR false   // for direct drive extruder v9 set to true, for geared extruder set to false
 
 // ENDSTOP SETTINGS:
 // Sets direction of endstops when homing; 1=MAX, -1=MIN

Marlin/temperature.cpp

@@ -460,11 +460,14 @@ void checkExtruderAutoFans()
   #endif 
   #if defined(EXTRUDER_2_AUTO_FAN_PIN) && EXTRUDER_2_AUTO_FAN_PIN > -1
     if (EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN 
+        && EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
         && EXTRUDER_2_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
       setExtruderAutoFanState(EXTRUDER_2_AUTO_FAN_PIN, (fanState & 4) != 0);
   #endif
   #if defined(EXTRUDER_3_AUTO_FAN_PIN) && EXTRUDER_3_AUTO_FAN_PIN > -1
     if (EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN 
+        && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_0_AUTO_FAN_PIN)
+        && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_1_AUTO_FAN_PIN)
         && EXTRUDER_3_AUTO_FAN_PIN != EXTRUDER_2_AUTO_FAN_PIN)
       setExtruderAutoFanState(EXTRUDER_3_AUTO_FAN_PIN, (fanState & 8) != 0);
   #endif