Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -rb003e0e60487302c022714f168d9f5dffc09d226 -ra140769de454d638730bbfd1fabdf6ce2b949d35
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision b003e0e60487302c022714f168d9f5dffc09d226)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision a140769de454d638730bbfd1fabdf6ce2b949d35)
@@ -486,9 +486,7 @@
         }
         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;
         }