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    AmatuerAC's Avatar
    AmatuerAC Posts: 1, Reputation: 1
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    #1

    Oct 24, 2010, 06:06 PM
    Condenser Contactor Switch
    I have a Lennox condenser model Number 13acd-042-230-01. The contactor switch does not stay in. It pulls in, the fan runs, the compressor kicks on and then within two minutes it pops out.
    I have cleaned the contactor switch with electrical contact spray and replaced the thermostat with a brand new one. That did not work.
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Oct 24, 2010, 06:18 PM

    You should have 24 volts at contactor for it to stay in, check voltage at contactor coil to see if 24 volts is present when it deenergizes.
    I wonder if contactor has shorted windings drawing excessive current.
    Also I would suspect low voltage wiring from air handler to compressor unit, any short may draw excessive current?
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