[SOLVED] 3 way fridge won't run on 12v
Edit: Solved The switch, which I had previously determined was the problem and replaced, was in fact the problem. Replacing the switch with a new one had fixed the original problem. However, the is...
Forum Discussion
The 3 way Dometic, had a 12 volt Ignition wire connection on the Dometic refer. The OEM ran that 12 volt wire from the Ignition side of the Motorhome to that connection. The PROBLEM most OEM's caused was, they rarely ran the required 8 gauge pos and neg wire from the battery to the refer. On Auto or on the models that had a 12 volt switch option, when the Ign terminal on the rear of the Dometic refer was HOT, the refer ran on 12 volt element in transit. When you turned the Engine OFF, the 12 volt refer element also went off. They did this to keep the refer from draining the battery if you forgot it was on 12 volt. They have 2 models of a 3 way. OLDER models did run thru the tstat. Newer models run direct and bypass the tstat and are advertised as "maintainers of cold and not designed to cool the refer. Just will maintain the cool while in transit. The OP's refer is an OLD model that does have tstat that will control the 12 volt. Doug
