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    jjdavis2627's Avatar
    jjdavis2627 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jun 2, 2007, 09:54 PM
    Having problems with our lennox hs18-261-c8p a/c unit not coming on
    Hi having problems with the wiring to get the outdoor unit to come on I checked it outside in the panel and it kicks on when I push in the switch in the middle of the wiring on the outdoor unit and the 2 small voltage wires on the thermostat is a honeywell ct3600 I have the + side going to rc and common to y.in the furnace it's a lennox g8q3-90e-4 the voltage at the transformer is 28volts does the + go here and the common off any ground or does it need to go to anyone special


    Thanks in advance!!

    Jason d
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #2

    Jun 2, 2007, 10:12 PM
    Can you better explaine this, I'm not sure I undestand, there should be a cable running from the furnace to the A/C one wire needs to be on the "Y" terminal at the furnace and the other on common.
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #3

    Jun 2, 2007, 10:13 PM
    Test the coil voltage at the contactor on the outdoor unit, do you have 24 volts?
    jjdavis2627's Avatar
    jjdavis2627 Posts: 2, Reputation: 1
    New Member
    		  
    #4

    Jun 4, 2007, 09:17 PM
    Yes it helped some few more things going on but ill get it soon thanks for the help!!

    Jason
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