Fault Codes/Rehlko/COOLNT TEMP HIGH WARNING/SHUTDWNRehlkoCOOLNT TEMP HIGH WARNING/SHUTDWNUnclassifiedCoolingWhat This Code MeansHigh coolant temperatureRelated Rehlko Fault CodesCRANK LOST WARNINGCYLINDER DROPOUTCOOLANT TEMP LOW WARNINGCYLINDER DROPOUT CODESCOOLANT LVL LOW SHUTDWNECM WARNINGSBATTERY VOLTAGE LOWFAULTSBATTERY VOLTAGE HIGHFFBATT CHG FLTFUEL PRESSURE FAULTBrowse all Rehlko fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for COOLNT TEMP HIGH WARNING/SHUTDWN on your specific Rehlko unit — cited to the OEM manual, not a forum guess.Your question about COOLNT TEMP HIGH WARNING/SHUTDWNGET THE ANSWERFree account required — we'll bring your question with you.