AC problems

[Pete & Linda]

On our last trip I noticed a problem with the rear AC. It runs fine but twice in the middle of the night I noticed a loud humming noise and it was the AC, sounded like the compressor was running but not the fan. If I lower the thermostat then the fan will come on, if I raise the thermostat it will shut down, as it should. Any ideas? Just to make it interesting since I purchased this MH the front AC "fan" will not run on low (low fan or low AC) but the compressor will run (sounds just like the other one sounds). The thermostat has no effect on this one. I just run it on high. Thanks for any help.

[RV Wizard]

Your T'stat may have lost it programming. I have seen this happen with the Dometic Duo Therm units using the Comfort Control Center T'stat. If this is your set upTry doing a reset on the T'stat. If four button while the T'stat is off hold down the mode and down button and turn it on. On the five button it is mode and zone buttons.

[Pete & Linda]

Thanks Wizard. It's an (Electronic Climate Control) by Intellitec. The ac unites are RV Products (RVP) a division of AIRXCEL, which is confusing to me, on the inside ceiling unit it has Coleman Mach.

[RV Wizard]

OK, I forgot there was this system at one time as well that could lead to your scenario. I would suspect the controller for the air conditioners to be the culprit; more so, than the T'stat or air conditioner units. I think your controller is under the refrigerator. It might be as simple as cleaning any dust and moisture off the controller. If you need, I think I might have the service manual but I believe you can also download it from Service Manuals . Good luck and keep us posted.

[Pete & Linda]

Not aware of anything being under the refrigerator but will check. Thanks so much for helping.

[Pete & Linda]

Wizard I called Fleetwood yesterday and they tell me controller is under the bathroom sink behind the main AC/DC distribution panel. I will pull it and see. Will let you know. Thanks again for your help.