Index: firmware/App/Drivers/SafetyShutdown.c
===================================================================
diff -u -r22176ce95e49213c48454f34ddf5d29b8109f2cb -rb49fcf5c295e49f7133ea07398c54b083bf65d49
--- firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision 22176ce95e49213c48454f34ddf5d29b8109f2cb)
+++ firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision b49fcf5c295e49f7133ea07398c54b083bf65d49)
@@ -127,7 +127,7 @@
         case SAFETY_SHUTDOWN_SELF_TEST_STATE_IN_PROGRESS:
             if ( TRUE == didTimeout( safetyShutdownSelfTestTimerCount, SAFETY_SHUTDOWN_POST_TIMEOUT_MS ) )
             {
-                F32 v24 = getIntADCVoltageConverted( INT_ADC_PRIMARY_HEATER_24_VOLTS );
+                F32 v24 = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
 
                 // Verify 24V is down when w.d. expired
                 if ( v24 > MAX_24V_LEVEL_ON_SAFETY_SHUTDOWN )
@@ -145,7 +145,7 @@
         case SAFETY_SHUTDOWN_SELF_TEST_STATE_RECOVER:
             if ( TRUE == didTimeout( safetyShutdownSelfTestTimerCount, SAFETY_SHUTDOWN_RECOVERY_TIME_MS ) )
             {
-                F32 v24 = getIntADCVoltageConverted( INT_ADC_PRIMARY_HEATER_24_VOLTS );
+                F32 v24 = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
 
                 // Verify 24V is down when w.d. recovered
 //                if ( v24 < MIN_24V_LEVEL_ON_SAFETY_RECOVER )   // TODO - talk with systems why 24V does not recover fully.