Question about Ruud Matching Split Air Conditioner

1 Answer

Rudd 2 ton 10 S

Same problem, fan/unit goes off after 10 minutes or so. Replace run capacitor still same problem. When it is running cools very well, large copper pipe gets really cold and small copper pipe gets really hot. Exhaust from fan is warm. Fan does seem to have a little bit of dirty oil trail around the shaft.
Any help would be greatly appreciated.

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  • Anonymous May 25, 2009

    compressor on fan not

  • Danny Clark
    Danny Clark May 11, 2010

    I'm not understanding your problem.



    Is it keeping your house to the desired temp?



    Many units only need to run 10 min or so to satisfy the thermostat.



    Please describe your problem in detail.

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The small copper line should not be really hot its supposed to be carrying liquid refrigerant which has already had the heat "pressed" out of it by the compressor and carried of by the air flowing over the condenser coil. This could indicate a few things; that your unit is overcharged, you have a mismatched evaporator coil and condenser, an ineffective condenser fan motor or a clogged condenser coil and as a result your compressor is shutting of due to an overload condition from the building heat and back pressure between the compressor outlet and the evaporator inlet.

First make sure your condenser is clean and that adequate air is flowing over the fins of the condenser coil. Then be sure your equipment is a matched system. A indication that your condenser fan motor is not at speed is slow starting a humming sound and excessive heat. In my experience this complaint is generally the result of a bad condenser fan motor that over heats and shuts of after a short period and the build up of heat in the liquid refrigerant line of course trips the compressor overload circuit- which by the way usually takes hours to reset. I hope you've already resolved this, but in case you haven't......

Posted on Jan 29, 2009

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