Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rd31e9b40e9d56df8fa3551bbba63f6bec3a72811 -rfdb9b4b63043f6e5957caac1c0bc4d11704d15b8
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision d31e9b40e9d56df8fa3551bbba63f6bec3a72811)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision fdb9b4b63043f6e5957caac1c0bc4d11704d15b8)
@@ -478,9 +478,7 @@
         }
         else if ( fabs(deltaTempC) >= D5_HEAT_OUT_DEADBAND_CONTROL )
         {
-            updatedTarget = calculateUpdatedD28TargetDialysateTemp();
-            setHeaterTargetTemperature( D5_HEAT, updatedTarget );
-            ctrl = runPIController( PI_CONTROLLER_ID_D5_HEAT_OUTER_LOOP, getHeaterTargetTemperature( D5_HEAT ), measuredTempAtDialyzer );
+            ctrl = runPIController( PI_CONTROLLER_ID_D5_HEAT_OUTER_LOOP, getTDTargetDialysateTemperature(), measuredTempAtDialyzer );
             adjustedPrimaryTargetTemp = ctrl;
         }