Question about Ruud UAMB Air Conditioner

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Heat side of heatpump is blowing a transformer when switched to heating mode.

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  • Johnny
    Johnny May 11, 2010

    any recent work done to the system?

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It is either a shorted wire or a shorted component in the heat cycle wiring. The most likely is a bad reversing valve solenoid. You can use a re-settable transformer to help lower cost while troubleshooting. Remove the RV solenoid wires and set the unit for heat. If nothing blows,you will have found the problem. If it is not the RV,plug it back in and remove another low voltage wire and restart the unit. Keep doing this until the unit runs. When it runs OK,the last wire removed will go to the defective part.

Posted on Oct 04, 2009

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