Index: firmware/App/Controllers/DryBiCart.c
===================================================================
diff -u -r9416033250bf0e1a8c48d6a37322f2c4c59e6f0c -r50aa4c2d630370fa62f871b82db3afc70d763dcb
--- firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision 9416033250bf0e1a8c48d6a37322f2c4c59e6f0c)
+++ firmware/App/Controllers/DryBiCart.c	(.../DryBiCart.c)	(revision 50aa4c2d630370fa62f871b82db3afc70d763dcb)
@@ -1214,9 +1214,10 @@
     BICARB_CHAMBER_FILL_EXEC_STATE_T state  = BICARB_CHAMBER_PRESSURE_CHECK_STATE;
     F32 d66Pressure                         = getFilteredPressure( D66_PRES );
     LVL_STATE_T bicarbChamberLevel          = getBicarbChamberLevelStatus();
-
+#ifdef __D65_OPENING_DISABLED__
     // Close D65 irrespective of pressure for balancing chamber fresh side fill to complete.
     closeD65IfBalChamberSwitchImminent();
+#endif
 
     // Once upper level reached high , close the valve, timeout is for safety in case level sensor didn't work(10 sec), or else its a time based filling (3 sec)
     if ( ( LVL_STATE_HIGH == bicarbChamberLevel ) ||