Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r654c5598765bb862c00a0175bdac95604c6c9b24 -r8a4182663ef6b12e3fd6414c0c14158943cd4ce1
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 654c5598765bb862c00a0175bdac95604c6c9b24)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 8a4182663ef6b12e3fd6414c0c14158943cd4ce1)
@@ -119,6 +119,10 @@
     turnOnUVReactor( INLET_UV_REACTOR );
     turnOnUVReactor( OUTLET_UV_REACTOR );
 
+    // TODO remove
+    setPrimaryHeaterTargetTemperature( 39.0 );
+    // TODO remove
+
     startPrimaryHeater();
     setROPumpTargetFlowRate( TARGET_RO_FLOW_RATE_L, TARGET_RO_PRESSURE_PSI );
 }