Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rf656b17f3d8d93b4fca49c9725e096e7eb55acc7 -r3d131237935eb36e56e0d057a713430e31dc6405
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision f656b17f3d8d93b4fca49c9725e096e7eb55acc7)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 3d131237935eb36e56e0d057a713430e31dc6405)
@@ -121,7 +121,7 @@
 static BOOL hasStartTrimmerHeaterRequested;                                                             ///< Start trimmer heater request flag.
 static U32 heatersOnWithNoFlowTimer;                                                                    ///< Heaters are on but there is no sufficient flow.
 static TEMPERATURE_SENSORS_T primaryHeatersFeedbackTempSensor = TEMPSENSORS_OUTLET_PRIMARY_HEATER;      ///< Primary heaters feedback temperature sensors.
-static TEMPERATURE_SENSORS_T trimmerHeaterFeedbackTempSensor  = TEMPSENSORS_OUTLET_REDUNDANT;           ///< Trimmer heater feedback temperature sensors.
+static TEMPERATURE_SENSORS_T trimmerHeaterFeedbackTempSensor  = TEMPSENSORS_INLET_DIALYSATE;            ///< Trimmer heater feedback temperature sensors.
 static U32 primaryHeatersInternalTempOutTimer = 0;                                                      ///< Primary heaters internal temperature out of range timer.
 static U32 trimmerHeaterInternalTempOutTimer = 0;                                                       ///< Trimmer heater internal temperature out of range timer.
 static BOOL isPrimaryHeatersTempOutOfRange = FALSE;                                                     ///< Boolean flag to indicate if the primary heaters internal temperature out of range.
@@ -497,8 +497,13 @@
         // heat disinfect, the feedback sensor will be Thd
         if ( DG_MODE_HEAT == getCurrentOperationMode() )
         {
+#ifdef THD_USING_TRO_CONNECTOR
             // Set the feedback temperature sensor
-            primaryHeatersFeedbackTempSensor = TEMPSENSORS_OUTLET_REDUNDANT; //TODO change this to Thd sensors once it is installed
+            // THd uses TRo in V3
+            primaryHeatersFeedbackTempSensor = TEMPSENSORS_OUTLET_REDUNDANT;
+#else
+            primaryHeatersFeedbackTempSensor = TEMPSENSORS_HEAT_DISINFECT;
+#endif
         }
 
         state = PRIMARY_HEATERS_EXEC_STATE_CONTROL_TO_TARGET;