diff --git a/Marlin/pins.h b/Marlin/pins.h
index a13c522f7..ad88338e8 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -1053,17 +1053,56 @@
 #define PS_ON_PIN          45
 #define KILL_PIN           46
 
-#define HEATER_0_PIN       2    // EXTRUDER 1
-#define HEATER_1_PIN       3    // EXTRUDER 2
-#define HEATER_2_PIN       6    // EXTRUDER 3
-//optional FAN1 can be used as 4th heater output: #define HEATER_3_PIN       8    // EXTRUDER 4
-#define HEATER_BED_PIN     9    // BED
+#if (TEMP_SENSOR_0==0)
+ #define TEMP_0_PIN         -1
+ #define HEATER_0_PIN       -1
+#else
+ #define HEATER_0_PIN        2    // EXTRUDER 1
+ #if (TEMP_SENSOR_0==-1)
+  #define TEMP_0_PIN         6    // ANALOG NUMBERING - connector *K1* on RUMBA thermocouple ADD ON is used
+ #else
+  #define TEMP_0_PIN         15   // ANALOG NUMBERING - default connector for thermistor *T0* on rumba board is used
+ #endif
+#endif 
 
-#define TEMP_0_PIN         15   // ANALOG NUMBERING
-#define TEMP_1_PIN         14   // ANALOG NUMBERING
-#define TEMP_2_PIN         13   // ANALOG NUMBERING
-//optional for extruder 4 or chamber: #define TEMP_2_PIN         12   // ANALOG NUMBERING
-#define TEMP_BED_PIN       11   // ANALOG NUMBERING
+#if (TEMP_SENSOR_1==0)
+ #define TEMP_1_PIN         -1
+ #define HEATER_1_PIN       -1
+#else
+ #define HEATER_1_PIN        3    // EXTRUDER 2
+ #if (TEMP_SENSOR_1==-1)
+  #define TEMP_1_PIN         5    // ANALOG NUMBERING - connector *K2* on RUMBA thermocouple ADD ON is used
+ #else
+  #define TEMP_1_PIN         14   // ANALOG NUMBERING - default connector for thermistor *T1* on rumba board is used
+ #endif
+#endif
+
+#if (TEMP_SENSOR_2==0)
+ #define TEMP_2_PIN         -1
+ #define HEATER_2_PIN       -1
+#else
+ #define HEATER_2_PIN        6    // EXTRUDER 3
+ #if (TEMP_SENSOR_2==-1)
+  #define TEMP_2_PIN         7    // ANALOG NUMBERING - connector *K3* on RUMBA thermocouple ADD ON is used <-- this can not be used when TEMP_SENSOR_BED is defined as thermocouple
+ #else
+  #define TEMP_2_PIN         13   // ANALOG NUMBERING - default connector for thermistor *T2* on rumba board is used
+ #endif
+#endif
+
+//optional for extruder 4 or chamber: #define TEMP_X_PIN         12   // ANALOG NUMBERING - default connector for thermistor *T3* on rumba board is used
+//optional FAN1 can be used as 4th heater output: #define HEATER_3_PIN       8    // EXTRUDER 4
+
+#if (TEMP_SENSOR_BED==0)
+ #define TEMP_BED_PIN       -1
+ #define HEATER_BED_PIN     -1
+#else
+ #define HEATER_BED_PIN      9    // BED
+ #if (TEMP_SENSOR_BED==-1)
+  #define TEMP_BED_PIN       7    // ANALOG NUMBERING - connector *K3* on RUMBA thermocouple ADD ON is used <-- this can not be used when TEMP_SENSOR_2 is defined as thermocouple
+ #else
+  #define TEMP_BED_PIN       11   // ANALOG NUMBERING - default connector for thermistor *THB* on rumba board is used
+ #endif
+#endif
 
 #define SDPOWER            -1
 #define SDSS               53
diff --git a/Marlin/temperature.cpp b/Marlin/temperature.cpp
index 85017750b..18cdec65f 100644
--- a/Marlin/temperature.cpp
+++ b/Marlin/temperature.cpp
@@ -571,6 +571,12 @@ static void updateTemperaturesFromRawValues()
 
 void tp_init()
 {
+#if (MOTHERBOARD == 80) && ((TEMP_SENSOR_0==-1)||(TEMP_SENSOR_1==-1)||(TEMP_SENSOR_2==-1)||(TEMP_SENSOR_BED==-1))
+  //disable RUMBA JTAG in case the thermocouple extension is plugged on top of JTAG connector
+  MCUCR=(1<<JTD); 
+  MCUCR=(1<<JTD);
+#endif
+  
   // Finish init of mult extruder arrays 
   for(int e = 0; e < EXTRUDERS; e++) {
     // populate with the first value 
@@ -647,7 +653,7 @@ void tp_init()
     #if TEMP_2_PIN < 8
        DIDR0 |= 1 << TEMP_2_PIN; 
     #else
-       DIDR2 = 1<<(TEMP_2_PIN - 8); 
+       DIDR2 |= 1<<(TEMP_2_PIN - 8); 
     #endif
   #endif
   #if (TEMP_BED_PIN > -1)
@@ -689,7 +695,7 @@ void tp_init()
 
 #if (EXTRUDERS > 1) && defined(HEATER_1_MINTEMP)
   minttemp[1] = HEATER_1_MINTEMP;
-  while(analog2temp(minttemp_raw[1], 1) > HEATER_1_MINTEMP) {
+  while(analog2temp(minttemp_raw[1], 1) < HEATER_1_MINTEMP) {
 #if HEATER_1_RAW_LO_TEMP < HEATER_1_RAW_HI_TEMP
     minttemp_raw[1] += OVERSAMPLENR;
 #else
@@ -710,7 +716,7 @@ void tp_init()
 
 #if (EXTRUDERS > 2) && defined(HEATER_2_MINTEMP)
   minttemp[2] = HEATER_2_MINTEMP;
-  while(analog2temp(minttemp_raw[2], 2) > HEATER_2_MINTEMP) {
+  while(analog2temp(minttemp_raw[2], 2) < HEATER_2_MINTEMP) {
 #if HEATER_2_RAW_LO_TEMP < HEATER_2_RAW_HI_TEMP
     minttemp_raw[2] += OVERSAMPLENR;
 #else