Index: firmware/App/Drivers/SafetyShutdown.c
===================================================================
diff -u -r9e5ee62245eb2a73b167eabd6c274a71a76a7b0e -r3115c2cfd605f3b1f9be3bb2064116b0cd15e9c7
--- firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision 9e5ee62245eb2a73b167eabd6c274a71a76a7b0e)
+++ firmware/App/Drivers/SafetyShutdown.c	(.../SafetyShutdown.c)	(revision 3115c2cfd605f3b1f9be3bb2064116b0cd15e9c7)
@@ -126,10 +126,12 @@
         case SAFETY_SHUTDOWN_SELF_TEST_STATE_IN_PROGRESS:
             if ( TRUE == didTimeout( safetyShutdownSelfTestTimerCount, SAFETY_SHUTDOWN_POST_TIMEOUT_MS ) )
             {
-                F32 v24 = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
+                F32 v24         = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
+                F32 isolatedV24 = getMonitoredLineLevel( MONITORED_LINE_24V_POWER_PRIM_HTR_V );
 
+
                 // Verify 24V is down when w.d. expired
-                if ( v24 > MAX_24V_LEVEL_ON_SAFETY_SHUTDOWN )
+                if ( ( v24 > MAX_24V_LEVEL_ON_SAFETY_SHUTDOWN ) && ( isolatedV24 > MAX_24V_LEVEL_ON_SAFETY_SHUTDOWN ) )
                 {
                     SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_SAFETY_SHUTDOWN_POST_TEST_FAILED, 1.0, v24 );
                     safetyShutdownSelfTestStatus = SELF_TEST_STATUS_FAILED;
@@ -144,11 +146,13 @@
         case SAFETY_SHUTDOWN_SELF_TEST_STATE_RECOVER:
             if ( TRUE == didTimeout( safetyShutdownSelfTestTimerCount, SAFETY_SHUTDOWN_RECOVERY_TIME_MS ) )
             {
-                F32 v24 = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
+                F32 v24         = getIntADCVoltageConverted( INT_ADC_SECONDARY_HEATER_24_VOLTS );
+                F32 isolatedV24 = getMonitoredLineLevel( MONITORED_LINE_24V_POWER_PRIM_HTR_V );
 
                 // Verify 24V is down when w.d. recovered
-                if ( v24 < MIN_24V_LEVEL_ON_SAFETY_RECOVER )   // TODO - If issue persisted talk with systems why 24V does not recover fully.
+                if ( ( v24 < MIN_24V_LEVEL_ON_SAFETY_RECOVER ) && ( isolatedV24 < MIN_24V_LEVEL_ON_SAFETY_RECOVER ) )
                 {
+                    // TODO - If issue persisted talk with systems why 24V does not recover fully.
                     SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_SAFETY_SHUTDOWN_POST_TEST_FAILED, 2.0, v24 );
                     safetyShutdownSelfTestStatus = SELF_TEST_STATUS_FAILED;
                 }