Question about Ruud UBHC Air Conditioner

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When the system starts it sounds like something is falling off

The system cools fine and otherwise all is well but when it kicks in it sounds like something like the compressor is falling off. After a few seconds everything sounds fine. The original dealer has looked at it and says that is normal which I cannot believe.

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I would not worry, unless it is a distinctive sound that you just started
to notice. I can walk down a street and here units kick on all the time.
However I am trained for those sort of things.

If your unit is mounted to the side of your house on metal brackets, it is
possible that someone did not install isolation vibrators

Posted on Jul 13, 2010


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Sounds like a bad relay on the fan , if the compressor is trying to start and stopping that kick the fan on and off. That could be due to a low charge if the unit is not cooling properly.

If the unit is cooling properly it is probably a bad relay or contactor on the fan motor.

Other possibility is the fan motor is over heating for one reason or another and if its thermally protected it will automatically shutdown. If thats the case then you need a new motor.

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