Sounds like the Norcold is running in back-up mode, where the cooling unit operates continuously. Might be as simple as a broken thermister or faulty eyebrow board. Excessive cooling is a control problem, not a failed cooling unit.
That said, a smaller apartment size fridge is a fairly easy install if you have some basic handyman skills. It's a matter of choosing a model that fits in the space and can still fully open the door(s). Fridge manufacturers have excellent dimensions on their website, so measure up your space, both length/width/height and door-swing, and start hunting the best fit.
You will need an inverter, preferably pure sine, if you expect to power the fridge between campsite hook-ups, or camp without hook-ups. You also need enough battery amp-hours to support whatever time you will be off-grid. Some folks simply cool the fridge at home and drive to a campground with the fridge off, then plug in at arrival. It should be good for at least a few hours of travel.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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