So we have narrowed this issue down to the following based on SH and Boz's info: Now i need to try the most likely solution first cause i don't have alot of time. Which would you try?? The last two trips I've had a problem with the fridge staying cold the whole time. I fire up the propane the day before we leave and it is around 40 degrees when we are ready to go (overnight). I drive to the campground(s) (3 1/2 hrs and 1/2 hr trips) and the temp goes up. I level the unit and let it sit and the temp still is high (~4hrs). I switch to electric, which never seems to cool properly from day one about 3 years ago now, and it gets cool but not enough (over night). I switch back to propane and in a few hours it is at 40 again. There isn't a complete pattern of when it does this. (This is for non electronic controlled refers). Sounds like it could be your themostat has gone bad. To check the t-stat you need an extra person. you take the t-stat metal tube out from under its hole @ the fins in the refer and put it in some icewater. The heighth of the flame should change. if it doesn't change it out. To check the "Heating Element", first (as Kirk suggested) unplug the AC cord. Remove the two wires from the control board leading to the heating element. Set your meter to OHMs, at it's lowest setting, (Rx1 for analog meters). Attach your leads to the wire ends and note your OHM reading. Or, You might also have your LP pressure checked, This requires a special guage called a "monameter". Any shop can do this, and it only takes a few minutes. A high LP pressure creates to much heat, and can cause the cooling unit to crystalize, blocking the plumbing.