Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rba7a576375ad7bbfa0d5a879d82b8783e5182899 -r838df450f09668adbd73e61fadbff8c81fe7926e
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision ba7a576375ad7bbfa0d5a879d82b8783e5182899)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 838df450f09668adbd73e61fadbff8c81fe7926e)
@@ -465,15 +465,20 @@
  *************************************************************************/
 static void transitionToPatientConnection( void )
 {
+    VALVE_T valve;
     setUFVolStatus = FALSE;
     patientConnectionConfirm = FALSE;
     treatmentStartRequested = FALSE;
 
-    cmdStartDGTrimmerHeater();
+    for ( valve = VDI; valve < NUM_OF_VALVES; ++valve )
+    {
+        setValvePosition( valve, VALVE_POSITION_C_CLOSE );
+    }
 
     signalBloodPumpHardStop();
     signalDialOutPumpHardStop();
     setDialInPumpTargetFlowRate( DIP_PATIENT_CONNECTION_FLOW_RATE_ML_MIN, MOTOR_DIR_FORWARD, PUMP_CONTROL_MODE_OPEN_LOOP );
+    cmdStartDGTrimmerHeater();
 }
 
 /*********************************************************************//**