If it is a Norcold and anything like the one I had in my last trailer, you have to manually switch it to AC. IIRC, the mode switch used 0 (zero) for off, a sine wave for ac and a flame for propane.
Then, when switching over to propane, you had to get a good fire going back there using a piezo igniter and microvolt gauge. ...
Did the fridge have a really strong acrid/pungent odor when you pulled it from winter storage?
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!