Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -re87de1c84010d764abe71d38272ca34e2733a306 -r2bf612eeb70204a5ca65697b9054948919b854b7
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision e87de1c84010d764abe71d38272ca34e2733a306)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 2bf612eeb70204a5ca65697b9054948919b854b7)
@@ -742,7 +742,16 @@
         F32 targetTemperature         = heatersStatus[ heater ].targetTempC;
         F32 dutyCycle                 = calculateTrimmerHeaterDutyCycle( targetTemperature, dialysateInletTemperature, targetFlowLPM, TRUE );
 
-        tempDutyCycle = heatersStatus[ heater ].dutyCycle.data + dutyCycle;
+        if ( fabs( heatersStatus[ heater ].prevDiaTargetFlowLPM - targetFlowLPM ) > NEARLY_ZERO )
+        {
+            tempDutyCycle                              = dutyCycle;
+            heatersStatus[ heater ].isThisFirstControl = TRUE;
+        }
+        else
+        {
+            tempDutyCycle = heatersStatus[ heater ].dutyCycle.data + dutyCycle;
+        }
+
         tempDutyCycle = MIN( tempDutyCycle, HEATERS_MAX_DUTY_CYCLE );
         tempDutyCycle = MAX( tempDutyCycle, HEATERS_MIN_DUTY_CYCLE );
         heatersStatus[ heater ].dutyCycle.data = tempDutyCycle;
@@ -979,6 +988,7 @@
         data.primaryCalcTargetTemp  = heatersStatus[ DG_PRIMARY_HEATER ].calculatedTemperatureC;
         data.trimmerCalcCurrentTemp = heatersStatus[ DG_TRIMMER_HEATER ].calculatedTemperatureC;
         data.trimmerUseLastDC       = (U32)heatersStatus[ DG_TRIMMER_HEATER ].useLastDutyCycle;
+        data.previsouFlow           = heatersStatus[ DG_TRIMMER_HEATER ].prevDiaTargetFlowLPM;
         dataPublicationTimerCounter = 0;
 
         broadcastData( MSG_ID_DG_HEATERS_DATA, COMM_BUFFER_OUT_CAN_DG_BROADCAST, (U08*)&data, sizeof( HEATERS_DATA_T ) );