Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r752ec32e48ba27c3939d7e8ec56091cb917e3eef -rf3e04ea7d6ed79da693be6e0d4460c8e836641df
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 752ec32e48ba27c3939d7e8ec56091cb917e3eef)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision f3e04ea7d6ed79da693be6e0d4460c8e836641df)
@@ -544,7 +544,7 @@
 {
     HEATERS_STATE_T state = HEATER_EXEC_STATE_CONTROL_TO_DISINFECT_TARGET;
 
-    F32 heatDisinfectSensorTemp = getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT );
+    F32 heatDisinfectSensorTemp = getTemperatureValue( TEMPSENSORS_OUTLET_PRIMARY_HEATER ); //getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT );
 
     // Check if the heaters control conditions have changed, if yes, switch back to ramp to target
     if ( TRUE == haveHeaterControlConditionsChanged( heater ) )
Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r752ec32e48ba27c3939d7e8ec56091cb917e3eef -rf3e04ea7d6ed79da693be6e0d4460c8e836641df
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 752ec32e48ba27c3939d7e8ec56091cb917e3eef)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision f3e04ea7d6ed79da693be6e0d4460c8e836641df)
@@ -1940,14 +1940,14 @@
     HEAT_DISINFECT_STATUS_T status = HEAT_DISINFECT_HEAT_UP_IN_PROGRESS;
 
     F32 TPoTemp = getTemperatureValue( TEMPSENSORS_OUTLET_PRIMARY_HEATER );
-    F32 ThdTemp = getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT );
+    F32 ThdTemp = getTemperatureValue( TEMPSENSORS_OUTLET_PRIMARY_HEATER ); //getTemperatureValue( TEMPSENSORS_HEAT_DISINFECT );
 
     BOOL isR1OutOfRange = fabs( getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_1_PRIMARY ) - R1HeatDisinfectVol ) > RSRVRS_MAX_TARGET_VOL_CHANGE_ML;
     BOOL isR2OutOfRange = fabs( getLoadCellSmallFilteredWeight( LOAD_CELL_RESERVOIR_2_PRIMARY ) - R2HeatDisinfectVol ) > RSRVRS_MAX_TARGET_VOL_CHANGE_ML;
 
     // Check if the temperature gradient in between the coldest and the hottest spot is more than the specified temperature and
     // the timer has not started yet, start it
-    if ( ( TPoTemp - ThdTemp > HEAT_DISINFECT_MAX_TEMP_GRADIENT_C ) && ( 0 == tempGradOutOfRangeTimer ) )
+    /*if ( ( TPoTemp - ThdTemp > HEAT_DISINFECT_MAX_TEMP_GRADIENT_C ) && ( 0 == tempGradOutOfRangeTimer ) )
     {
         tempGradOutOfRangeTimer = getMSTimerCount();
     }
@@ -1956,7 +1956,7 @@
     {
         alarmDetectedPendingTrigger = ALARM_ID_DG_HEAT_DISINFECT_TEMP_GRAD_OUT_OF_RANAGE;
         status                      = HEAT_DISINFECT_TEMP_GRADIENT_OUT_OF_RANGE;
-    }
+    }*/
 
     // Check if either reservoir 1 or reservoir 2 are losing volume more than allowed volume
     if ( ( TRUE == isR1OutOfRange ) || ( TRUE == isR2OutOfRange ) )