AC Question(s)

[mikemc53]

OK, this just started acting up, today. Have the dual roof air with a DuoTherm Comfort Control thermostat. The front (zone 1) unit is now wanting to run almost continuously even though the outside temperature is only in the upper 70's. The rear unit (zone 2) works fine. It is set at 74 and comes on, runs for a short time and shuts off. The temp in the back of the coach stays nice and even. The front one runs on and on and the coach gets very cold even though we set thermostat all the way up to 80 - I eventually just shut it off.

Until this morning all was right with the AC but now I don't know if it is an AC issue, a thermostat issue, or something else.

Thoughts?

[Roy1]

Probably the thermostat try doing the thermostat reset procedure. My thermostat has a mind of its own. It may not hurt to check low voltage plugs for good connections.

[Falconeer189]

My coach had the identical problem, it was the control board on the front air conditioner, tech said the run relay was stuck. Replaced the board and life is good again.