Index: firmware/App/Modes/ModeGenDialysate.c
===================================================================
diff -u -r771a741a1698770e6997c6657bd520fb557d0f2d -r1dadcc3a995842bfd2bffa2fc8dddced3b7b575e
--- firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 771a741a1698770e6997c6657bd520fb557d0f2d)
+++ firmware/App/Modes/ModeGenDialysate.c	(.../ModeGenDialysate.c)	(revision 1dadcc3a995842bfd2bffa2fc8dddced3b7b575e)
@@ -297,6 +297,8 @@
             setHeaterTargetTemperature( D5_HEAT, getGenDialysateTargetTemperature() );
             setD28TempFeedbackControl( TRUE );
             startHeater( D5_HEAT );
+            // Stop trimmer heater
+            stopHeater( D45_HEAT );
 
             setDialysatePumpTargetRPM( D12_PUMP, FRESH_DIAL_PUMP_INITIAL_RPM, TRUE );
             setDialysatePumpTargetRPM( D48_PUMP, SPENT_DIAL_PUMP_FILL_RPM, TRUE );