Index: firmware/App/Modes/ModeGenDialysate.c
===================================================================
diff -u -r5398b91c33e6fd39a74dbe132e50120965ef4107 -r325e67dab10f6666702bf0f1256015b31e58de4f
--- firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 5398b91c33e6fd39a74dbe132e50120965ef4107)
+++ firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 325e67dab10f6666702bf0f1256015b31e58de4f)
@@ -237,7 +237,6 @@
             //Previous state
             setValveState( D47_VALV, VALVE_STATE_CLOSED );  // spent chamber purge valve
             setValveState( D64_VALV, VALVE_STATE_CLOSED );
-            setValveState( M4_VALV, VALVE_STATE_OPEN );
             setValveState( D14_VALV, VALVE_STATE_OPEN );
             setValveState( D53_VALV, VALVE_STATE_OPEN );   // Drain valve
 
@@ -262,8 +261,6 @@
             //Set valves and actuators
             setValveState( D35_VALV, VALVE_STATE_CLOSED );  // VDI
             setValveState( D40_VALV, VALVE_STATE_CLOSED );  // VDO
-
-            setValveState( M4_VALV, VALVE_STATE_OPEN );
             setValveState( D14_VALV, VALVE_STATE_OPEN );
             setValveState( D53_VALV, VALVE_STATE_OPEN );   // Drain valve
             setValveState( D34_VALV, VALVE_STATE_OPEN );    // Bypass valve
@@ -299,7 +296,6 @@
 
             setValveState( D53_VALV, VALVE_STATE_OPEN );   // Drain valve
             setValveState( D34_VALV, VALVE_STATE_OPEN );    // Bypass valve
-            setValveState( M4_VALV, VALVE_STATE_OPEN );
             setValveState( D64_VALV, VALVE_STATE_OPEN );    // Bicarb chamber purge valve
             bicarbFillStartTimeMS = getMSTimerCount();