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    markevo1974's Avatar
    markevo1974 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Jan 31, 2010, 08:50 PM
    No power to contactor
    My out side unit has no power 24v to the contactor ,thermostat is new ,fuses breakers good ,no power to green wire on outside unit
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 31, 2010, 09:05 PM
    You will have to trace the contactor wires back through any device attached and then back into the interior air handler until you find the part that is causing the problem. If the thermostat has been replaced and the problem started about that time I would look there first.
    markevo1974's Avatar
    markevo1974 Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Feb 1, 2010, 04:59 PM
    I should have mentioned I replaced the transformer also
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Feb 1, 2010, 07:39 PM
    As mentioned before you have your work cut out for yourself. Start tracing the wiring. You will eventually find the problem.
    markevo1974's Avatar
    markevo1974 Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Feb 6, 2010, 12:36 PM

    Yellow wire has 24 from thermostat,and is showing volts up to
    Circuit board ,if I put 24volts to contactor system outside starts
    Is crcuit board to blame
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