Index: firmware/App/Services/WatchdogMgmt.c
===================================================================
diff -u -rd52eeaec7379650a8cf901f06d3bd8ddf5cb7f06 -r48fa4e359dee8dae08067a7642ea3a8a526949d5
--- firmware/App/Services/WatchdogMgmt.c	(.../WatchdogMgmt.c)	(revision d52eeaec7379650a8cf901f06d3bd8ddf5cb7f06)
+++ firmware/App/Services/WatchdogMgmt.c	(.../WatchdogMgmt.c)	(revision 48fa4e359dee8dae08067a7642ea3a8a526949d5)
@@ -29,13 +29,14 @@
 
 // ********** private definitions **********
 
-#define MIN_WATCHDOG_PET_INTERVAL_MS        45                                  ///< Minimum watchdog pet interval.
+#define MIN_WATCHDOG_PET_INTERVAL_MS         45                                 ///< Minimum watchdog pet interval.
 
-#define WATCHDOG_POST_TIMEOUT_MS            500                                 ///< Watchdog POST timeout in ms.
-#define WATCHDOG_RECOVERY_TIME_MS           750                                 ///< Watchdog recovery time in ms.
+#define WATCHDOG_POST_TIMEOUT_MS             500                                ///< Watchdog POST timeout in ms.
+#define WATCHDOG_RECOVERY_TIME_MS            750                                ///< Watchdog recovery time in ms.
 
-#define MAX_24V_LEVEL_ON_WATCHDOG_EXPIRED   5.0F                                ///< Maximum voltage on 24V line when watchdog is expired.  // TODO - check w/ Systems.  Takes time for V to bleed off.  Had to raise to 5V.
-#define MIN_24V_LEVEL_ON_WATCHDOG_RECOVER   22.6F                               ///< Minimum voltage on 24V line when watchdog is recovered.
+#define MAX_24V_LEVEL_ON_WATCHDOG_EXPIRED    5.0F                               ///< Maximum voltage on 24V line when watchdog is expired.  // TODO - check w/ Systems.  Takes time for V to bleed off.  Had to raise to 5V.
+#define MAX_ISOLATED_24V_LEVEL_ON_WD_EXPIRED 22.6F                              ///< Maximum voltage on isolated 24V line when watchdog is expired. 10% of 24V.
+#define MIN_24V_LEVEL_ON_WATCHDOG_RECOVER    22.6F                              ///< Minimum voltage on 24V line when watchdog is recovered.
 
 /// List of watchdog states.
 typedef enum Button_Self_Test_States
@@ -175,7 +176,7 @@
                 F32 isolatedV24 = getMonitoredLineLevel( MONITORED_LINE_24V_POWER_PRIM_HTR_V );
 
                 // Verify 24V is down when w.d. expired
-                if ( ( v24 > MAX_24V_LEVEL_ON_WATCHDOG_EXPIRED ) || ( isolatedV24 > MAX_24V_LEVEL_ON_WATCHDOG_EXPIRED ) )
+                if ( ( v24 > MAX_24V_LEVEL_ON_WATCHDOG_EXPIRED ) || ( isolatedV24 > MAX_ISOLATED_24V_LEVEL_ON_WD_EXPIRED ) )
                 {
                     SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_WATCHDOG_POST_TEST_FAILED, 2.0F, v24 );
                     watchdogSelfTestStatus = SELF_TEST_STATUS_FAILED;