Index: firmware/App/Modes/ModeHeatDisinfect.c
===================================================================
diff -u -rb07b1a4480583d607bd6ba878cbf2edc5fd4054e -r4e605862b7ae972bad2191c2215509dab6baa63e
--- firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision b07b1a4480583d607bd6ba878cbf2edc5fd4054e)
+++ firmware/App/Modes/ModeHeatDisinfect.c	(.../ModeHeatDisinfect.c)	(revision 4e605862b7ae972bad2191c2215509dab6baa63e)
@@ -462,6 +462,7 @@
 
         // Close VPi to prevent wasting water
         setValveState( VPI, VALVE_STATE_CLOSED );
+        setValveState( VPO, VALVE_STATE_FILL_C_TO_NC);
 
         // Set the actuators to drain R1
         setValveState( VRD1, VALVE_STATE_OPEN );