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    goldeneye's Avatar
    goldeneye Posts: 2, Reputation: 1
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    #1

    Aug 12, 2007, 08:26 PM
    A/C Contactor not pulling in - Lennox
    A/C unit - It is a Lennox HS9-511-4P. The Control Relay is clicking when the A/C is turned on at the tstat but the Contactor is not pulling in. I have tested the fuses and they are fine. I have toggled the breakers. If I manually push-in the contactor, the compressor and fan work and I get cold air blowing in the house. The contactor coil is not doing it's thing I guess. What is my next step in identifying the culprit.
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #2

    Aug 12, 2007, 08:39 PM
    You might have to check the coil voltage with a meter to determine that you have 24 volts.
    Lennox units have a manual reset high pressure switch , it is a red button that you push in it is in the out door unit, good luck.
    goldeneye's Avatar
    goldeneye Posts: 2, Reputation: 1
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    #3

    Aug 12, 2007, 08:58 PM
    Ahhh! That cool air feels soooo good. Thank you a TON!!
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #4

    Aug 12, 2007, 09:04 PM
    NOW you still have a problem, why did it go off on this switch? The condenser coil is probably dirty and tomorrow if you take a water hose to it you will probably be OK. Mike
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