Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -r1c736261f1c4107c556710fe71da9f093fb89d4d -r213c09d4f8c37e562611df2539f73ffaea022f83
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 1c736261f1c4107c556710fe71da9f093fb89d4d)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 213c09d4f8c37e562611df2539f73ffaea022f83)
@@ -1513,6 +1513,7 @@
         // The drain is set to start from reservoir 2 since all the actuators have been de-energized
         // Set the drain valve to reservoir 2
         setValveState( VRD2, VALVE_STATE_OPEN );
+        setValveState( VPO, VALVE_STATE_FILL_C_TO_NC );
         setDrainPumpTargetRPM( targetRPM );
     }