I have the same refrig, same problem, lights on at control panel, 110 and propane work, chimney gets hot but system doesnt cool, was 2 years old in May, no evidence of amonia or yellow powder, refrig was only used about 20 nights and is like new. That little bimetal switch seems to have continuity in both positions? is there a way to bypass that to see if that is the problem? I checked the thermister and it has the correct OHMs , the control panel has correct volts. After only 2 years it seems like the refrig was defective?? Any help is appreciated.