My Dometic 2510 fridge in our truck camper has started freezing every thing when in A/C mode. Works as it should on gas. On gas, set on 3-4 ish it keeps the fridge at 38. On electric, even on 1 it freezes (right around 28-30). It would probably get even colder if I didn’t open the door often. The outside temperatures this weekend were in the high 70s during the day and mid 50s at night. I’m thinking thermostat, but wanted some opinions before I drop $85.00 on a new stat. What say you-all?