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dspencer's avatar
dspencer
Explorer
Jun 16, 2013

air conditioner noise, UPDATE Problem Solved

First of all I hope I got this in the right place if not I assume the mods will move it or tell me. I just returned from a weekend of camping and when I turned the AC on for the first time of the season this weekend there is a noise coming from the unit. It cools excellent the same as usual but there was a noise like a vibration or maybe something hitting the fan shroud. No performance issues what so ever. When I got home I got up on the roof and took the cover off and saw nothing in the line of a mud dauber nest or anything else other than a couple of very small starting of a mud dauber nest on two different fan blades. They were only the size of a pencil and only an inch or two long. It was just the very beginning of a nest starting it looks like. I don't have 30 amp service so I couldn't start it up after removing them but they just seemed so small I really don't think they could cause the noise but I'm no expert at all in fact really dumb when it comes to that type of thing. Does anyone have any ideals of what it might be? Thank You all in advance for guidance you can provided.

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  • mchero's avatar
    mchero
    Explorer
    Jun 18, 2013
    Electric motors on those AC units move TWO fans, One for the interior and one for the exterior. Pull that cover & let us know what you find. "might" need some of that aluminum tape to seal the joints.
  • dspencer's avatar
    dspencer
    Explorer
    Jun 17, 2013
    Well i may have missed something. I talked to the service manager at the dealership where i bought it from, whom i know very well. When i told him what i done his first question was did you check both fans out not just the back one. I said i didn't know there was a second fan and he said that once you remove the regular cover then you have to remove a sheet metal plate to get to the second one and he says thats probably where the problem is. He says thats about the only thing it can be and is the problem 95% of the time. I sure hope he's right, i will bring it back to the house this Friday and check that out. He says there's a regular fan in the back and a squirrel cage fan in the front. Does that make sense? I guess i totally missed that one. Any other insights or suggestions would be appreciated. It cools great and no other problems.
  • wa8yxm's avatar
    wa8yxm
    Explorer III
    Jun 17, 2013
    They may have been small but they were big enough.

    You don't need 30 amps. if you have a 12ga Extension cord (Sears or K-mart is your best source) and turn off EVERYTHING else in the RV you can test it on 20. Either turn off the breaker to the converter, or plug in for like 12 hours before testing.
  • Terryallan's avatar
    Terryallan
    Explorer II
    Jun 17, 2013
    You don't need 30 amp service to run the AC fan. Just turn the switch to ON. Then you will know if it was the fan or not. And in truth. You don't need 30 amp to run the AC. It should not pull 30 amps to start, and run. Supposedly. You only need 30 amp to run the entire TT.

    If for some reason the AC does pull 30 amps. The only thing that will happen, is you will trip the breaker of the socket you are plugged into. Un plug, and reset. Fixed.
  • dspencer's avatar
    dspencer
    Explorer
    Jun 17, 2013
    I'm hoping that was it but as small as the pieces were I'm not very confident.
  • dan-nickie's avatar
    dan-nickie
    Explorer
    Jun 16, 2013
    Those small nests may have been much larger before you turned the fans on :)

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