Forum Discussion

DC_MC's avatar
DC_MC
Explorer III
Oct 04, 2020

Air conditioner quit

Today we left RV with both airs working. A couple hours later we returned and the bedroom one was off. The breaker for that had gone off so we reset it. The unit made a kind of quiet hum and nothing else happened. Just wondered if this could be a repairable part to be replaced or are we probably gonna need a whole unit

4 Replies

  • if your like me? just dam old to get up there,call a rv mobil tech, ask if he knows ac repairs , before having him come out.
  • Sure sounds like starting capacitors. Easy enough to replace. Youtube is your friend.

    What model AC do you have? I just replaced one of mine yesterday. Hard to find them right now but Amazon saved the day. Weeks ago they had nothing.

    This one is a Dometice Penguin II. I had to also change out the internal circuit board so it would play with the old 5 button thermostat. Easy enough. The installation was about 2.5 hours but I am not young and really picky. Had help lifting the new one onto the rv and taking the old one off,. A scaffold worked fantastic.
  • Even if it is just the blower motor, you are spending about half the cost of brand new one with warranty and all other new parts. When both of mine died a year apart at age 7 and 8 I just replaced the entire unit. The installer was in and out in less than an hour for each.

    Well worth the extra $ to me. Full time 10+ years.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Is it repirable? Perhaps
    A quiet hum suggests the blower motor did not start
    This can be caused by one of two or three things but the hum rules out the third (Wiring issue)
    Bad Motor Start/Run Capicator.. this is about 20 -30 bucks plus labor unless you replace it yourself

    Bad blower motor 200-300 plus labor

    Now the other motor up there is the compressor.. repair on that one. you might as well replace the entire upper unit.


    OH one more possible issue So Something obstructing the fan or blower can also cause non-op But odds are low.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,279 PostsLatest Activity: Jul 04, 2025