A/C Question???

[Foldbak]

Originally Posted by MSand

So, reading this thread, it sounds exactly like what we are seeing on our new 5th wheel. I was out of town, and the AC kept shutting off and not coming back on for my wife. She got it to restart the first time by tripping the breaker at the post. The second time, it did not seem to resolve the issue. The dealership asked if it was freezing up, which would most likely be a low refrigerant charge. If it is related to the thermostat, that shouldn't be too bad to change. Is there an easy way to cycle the power to the thermostat that I am missing? I tried to cycle the AC breaker in the trailer, but that did not reset it.

I've not experienced this but I do have auto AC knowledge. A low charge wouldn't cause freeze up. Quite the opposite. A low charge would never get cold. Typically freeze up would be caused by a faulty evaporator core thermostat. It won't shut the unit off, it simply stops the flow of freon until the core temp drops. There can only be a few things shutting off the AC unit. An over pressure switch, the wall thermostat, the power source or the control board in the AC itself. If you have 2 AC units maybe swap the thermostats? It's a start but it sounds like something for a qualified tech.

[phillyg]

My original and recent replacement Dometic AC, model 641916AXXIJO, always short (for lack of a better word) cycles, but I've been told it's the thermostat. My understanding is the Micro-air thermostate fixes it.