Thanks Mike-Kinda where I was goin' with this-if the display always says the same, then it's time to just unplug the thing. Now as for the FET temp reading, I think this has to do with the inverter output (field effect transistors). I never have a need to run the inverter, so that FET number doesn't change either. The coach is not plugged into shore power where it is stored, so I don't wanna run the inverter hard just to check the FET temp. Oh well.......