Just came back from some nice camping at Agua Caliente, full hook ups. Our little Rockwood 2005 pop up (1640), has the original Dometic 3 way fridge. Have not had issues since I bought the pop up a few years ago. But we could not get it to work using the 120v switch. There was electricity at that little outlet in the back area, but never cooled. I then tried to switch it to Propane, and I could not get it to stay lit?? I could get it lit if I pressed the button in, but as soon as I let the button up, it stopped. So then for fun, I tried the 12v option (never did that before) and sure enough it started to cool. ?? Any ideas on what is going on here?