Index: firmware/App/Controllers/Heaters.c
===================================================================
diff -u -r85e7d6f43d0d6f8fbf77a0894373c5003cf93c6e -r3e26dba2affe762d5ebad791a51e036bd2aa060a
--- firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 85e7d6f43d0d6f8fbf77a0894373c5003cf93c6e)
+++ firmware/App/Controllers/Heaters.c	(.../Heaters.c)	(revision 3e26dba2affe762d5ebad791a51e036bd2aa060a)
@@ -855,7 +855,7 @@
 static void monitorHeatersVoltage( void )
 {
     // NOTE: Default to using Primary heater voltage from FPGA
-    F32 mainPriVoltage = getMonitoredLineLevel( MONITORED_LINE_24V_PRIM_HTR_V );
+    F32 mainPriVoltage = getMonitoredLineLevel( MONITORED_LINE_24V_PRIM_HTR_GND_V );
 #ifndef _RELEASE_
     if ( SW_CONFIG_ENABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_ENABLE_V3_SYSTEM ) )
     {