diff --git a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
index 14bf3b4..d6b2d63 100644
--- a/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
+++ b/epics/iocs/ISTTOKrpi/ISTTOKrpiApp/src/IsttokSeqExec.stt
@@ -452,7 +452,7 @@ ss PulseSequence {
 
         when (IsttokOPREQ == STOP) {} state Stopping
 
-        when ( pvStatus(IsttokVVesselTemperature) != pvStatOK)  {
+        when (pvSeverity(IsttokVVesselTemperature) >= pvSevrMAJOR)  {
             /* Temperature Limit Pulse state change to Process */
             //IsttokProcReq = STOP;
             //pvPut(IsttokProcReq);