We feel for ya. We had the same fridge,quit just like that and then a few nights later I smell the ammonia.Heck, I was blaming it on the cats and darn near threw em out. Thankfully for me and the cats I checked the back panel and there was the dreaded yellow stuff.
We too were naysayers about ever putting in a residential fridge until we looked thru the internet and you tube and a trip to menards with our tape measure made up our minds.
What we got was more efficient even at higher altitudes, holds more food and uses far less power than we ever thought. We have 400 watts of solar and 4 agm batteries and it works great unless like most on solar, we have a cloudy day or two and then we give the batteries a generator boost for a few hours.
When we are driving down the road, our truck alternator is charging all of our batteries anyway, and if this fridge goes out in a few years, a new one is 3 or 400 bucks and an easy install.
And we are not camp grounder types. We are very serious boondockers and fulltimers and rarely stay at a campground. We are probably some of the few that never get our monies worth out of a Passport membership as we boondock so much.
Yeah, We were ones that said NO, we never would on a residential fridge and now we say, NO, we'll never go back.
It's a choice and not for everyone we are sure,but it sure was a no brainer for us.
Best of luck with your fridge and hopefully it's just the thermistor,,,,,this time.