Question about Ruud UBHC Air Conditioner

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Ruud ac 16 seer cooling fan not working

We have had this problem before. last summer the fan failed when switched on after the winterfor the first time.

They came and 'fixed' this saying it was a loose wire.

Now the same thing has happened again. switched the cooling on after the winter and the fan does nothing.

Cannot get any help from Ruud (no email contact and they have not called me after I left a voice message).

Supposed to be covered by 5 years Parts & Labor but the installer has gone out of business it seems.

Anyone else had this problem and a solution?

Regards, Liam


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  • 5 more comments 
  • liam_donalds Apr 25, 2009

    There is probably no loose wire in my case.

    Yes, I was talking about the outside fan. However that works fine.

    I had an ac guy look at it and he thinks its the contactor. It does not close when the thermostat sends the cooling signal.

    The fan works as he started it by closing the contactor manually.

    He did not know enough about Ruud ac (its a 16 seer two stage type system) so he arranged for another person familiar with these Ruud systems to come on Monday next.

    I'm hoping its just the contactor but who knows?

    Why would it work till the end of summer but not work the following summer? The same thing happened lasy year.

    Ruud have been completely unhelpful. I will never touch their equipment again.

    Thanks for your help.








  • liam_donalds Apr 26, 2009

    "These 16 SEER units have a small circuit board on them more then likely it is bad".

    Do you mean the Diagnostic board mounted on the side of the main control part?

    When this problem happened last year the so called installer / repair guy was fiddling with that diagnostic part - claimed there was a loose wire in there.

    Also how much are these parts?

    I'm supposed to be covered by warranty.





  • liam_donalds Apr 28, 2009

    The problem was that there was almost no coolant in the pipe. There must be a small leak somewhere. The low pressure switch prevented the fan etc from starting.

    This is probably an installation problem but maybe a damaged condenser.




  • Ken Bledsoe May 11, 2010

    Thanks for telling me what was up on your unit. You are right in your following statement.

    "this is probably an installation problem but maybe a damaged condenser." Damaged the compressor of the condenser. I mean might have shorten the life. So I would really push for a new condenser.


  • Ken Bledsoe May 11, 2010

    I am talking about the condenser outside part they have a small board on them. Broads cost 50 to 75 ..

    I think the guy you are dealing with was on the inside board. They can run 200 bucks. Good thing you have a warranty


  • Ken Bledsoe May 11, 2010

    These 16 SEER units have a small circuit board on them more then likely it is bad. having depressed the contactor by hand proved that everything is good so you will need a new board. I just ran into that today I jumped around the board and working perfectly. Going to get a new part monday and will be good to go. But this weekend she has a A/C for our sticky weather we are having here in Kansas.

  • Ken Bledsoe May 11, 2010

    Being loose wire you might have used up the fan motor and need a new one. You are talking about the fan outside right?

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Go to rudds website and there should be a place where you can find a factory authorized dealer in your area.

Posted on Apr 25, 2009

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