An electric/propane fridge needs heat for the cooling cycle to work. It also needs your use/store switch to be left “on” so the fridge controls get 12vdc to function.....just in case anyone did not already know this.
If cavie's suggestion does not work, since the fridge was working on electric (shore power) until something happened overnight......it is possible that the 120vac heating element has failed (infant mortality perhaps since your coach is new). I am assuming you still have normal 120vac to the fridge element (no breakers tripped; plug is still in power outlet inside the fridge outside access panel, no control board fuses blown related to AC heater, etc.). This heating element is usually located in the fridge chimney and is accessed via outside fridge access panel. Its easy to test with an ohm meter across the element conductors, but make sure no shore power is connected and gen if off ....if you try this. Since the coach is new, time for some warranty work by the Dealer if no other obvious AC issues can be found.
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