3greens,
All these ammonia-based refrigerators need a couple of things to cool properly.
- need to be pretty level because there's a gravity flow tubing system on the back that won't work if it's much off level
- need ventilation around the back so the heat transferred from inside to outside has somewhere to go.
- need a good seal on the doors so there are no air leaks.
- need up to 12 hours to get cold
- need airflow inside the frig
- need to heat the ammonia solution inside the cooling unit, either with the electric heater or the LP heater.
If all works well on LP, but not on electric, it usually means there's a problem with the electric heater. The most likely cause is lack of 110V power to the heater.
Most refrigerators have 2 modes: auto and LP. In auto mode, it tries to run on 110V, and if there's no power, it switches automatically to LP. Sounds like yours is not doing that, so either it's not an automatic switchover, or it has 110V but just isn't cooling well. Check the outlet the frig plugs into: with a voltmeter, a non-contact voltage tester, or by plugging a known good appliance into the outlet. If the outlet is working, you might have a blown fuse on the refrigerator's control board. Or the electric heating unit may not be working. Probably need a dealer tech to help at this point.