Air Conditioner/Heater out of control

[r2dillon]

I have a 2004 Pace Arrow. This weekend, when checking on the motor home, I found the fans on both AC running, even though the switch was off. I opened the breakers. Later, I went out and found that the heaters had started. Again the switches were off. I cut the propane, but the heater fans are still cycling periodically. Does anyone know what is happening?

[r2dillon]

I have a 2004 Pace Arrow. This weekend, when checking on the motor home, I found the fans on both AC running, even though the switch was off. I opened the breakers. Later, I went out and found that the heaters had started. Again the switches were off. I cut the propane, but the heater fans are still cycling periodically. Does anyone know what is happening?

[Gary RVRoamer]

Sounds like your thermostat is calling for heat or cool (or maybe both), regardless of the setting. Could be a short maybe?

Since this is a generic furnace/ac control problem and not in any way a unique to a Pace Arrow, I'm adding a shortcut in the Motorhome Problems area to get input from other RV owners.

[Bob (WA0MQE)]

Contact http://intellitec.com/ and tell them your problem. I had a similar issue with a the thermostat on my '04 Pace Arrow. Mine was an intermittent problem, took it back to the dealer three times and they didn't fix it. Kept replacing other parts. When I spoke with Intellitec they didn't even question my problem, said I needed a new Thermostat. Which is the panel with the switches and temperature adjustments. I think they call it an ECM. Because my coach was out of warranty I had to pay for it, about $132 if memory serves. But I didn't care, it cured the problem.

[Petro]

r2dillon;

I had a similar problem on my Chieftain. The furnace blower would come on all by it self with the thermostat off. After a lot of testing I found a bad ballast sending a RF back down the light switch wire that was near the thermostat wire. I tested it out by disconnecting the suspected fluorescent light. My problem ended when the light was disconnected. I switched the light with one toward the front. No more problems. When I was researching my problem I found situations where TVs would go on & off all by them selves when a bad fluorescent light was on.

Good luck and please let us know how you fix your problem.

Don