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cpd520's avatar
cpd520
Explorer
Apr 01, 2020

Air conditioner troubleshooting

Hi all, here's my issue. 2014 Phaeton MH.

Two roof AC's (Airxcel units). For a while I noticed rear unit ac and electric heat were hit and miss starting, very random. Initially it was so occasional that I thought I was imagining. Now it won't start on AC or electric heat. The fan still comes on when set to Fan Mode "on" position and propane heat comes on. The fan didn't bog or slow down when it did decided to work.

Physical inspection on roof didn't show any obvious issues.

It's getting warm here in Casa Grande, AZ. I need to troubleshoot this and get it fixed or call a repairman in.

Any AC guys on here to give me some diagnosing advice??
  • cpd520's avatar
    cpd520
    Explorer
    Apr 11, 2020
    Quick update - Turned out to be in the thermostat. New thermostat and all is well. Thx everyone!
  • cpd520's avatar
    cpd520
    Explorer
    Apr 03, 2020
    Good point Dford.

    The AC is a 47000 series heat pump by Airxcel. The thermostat is marked RVComfort.HP

    garyemunson, we do have a power management system. No indications of trouble. Any idea on testing it?

    jdc1We, I won't ask you how you know this. We are parked at our lot in Casa Grande. The power is 50 amp. Not a generator or low power issue.

    Lwiddis, it was a short window from intermittent to not working. Thanks for the help.
  • jdc1's avatar
    jdc1
    Explorer II
    Apr 02, 2020
    What was the source of electricity? If you were plugged in at home to a 120V (15A) outlet, you may have not been drawing enough amps....and fried something. Even if it were a 20A curcuit, the wire length may have dropped the amperage enough to do harm to your AC unit. I don't want to tell you how I know this stuff. LOL.
  • garyemunson's avatar
    garyemunson
    Explorer II
    Apr 02, 2020
    Most newer RVs have a power control center that prevents A/Cs from starting together and/or makes sure generator has caught it's breath before letting the A/Cs come on line. When those start getting flaky that's a symptom. I'd look into that.
  • Lwiddis's avatar
    Lwiddis
    Explorer II
    Apr 01, 2020
    When it was “hit and miss” why didn’t you fix it or get it fixed? That was your warning.
  • DFord's avatar
    DFord
    Explorer
    Apr 01, 2020
    To get spot on assistance, you have to give all the information you can on what you're having trouble with. Not everyone know what brand of a/c or thermostat Tiffin used in your MH at least I sure don't. Hope Doug has the time to respond once you've mentioned the brands (model?) of your equipment.

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