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    labarca's Avatar
    labarca Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 26, 2010, 06:47 PM
    Wesco air conditioning sp24-1
    I wanted to replaced my old thermostat but I los truck of the wiers color and numbers
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 26, 2010, 08:30 PM
    Red= transformer 24 volts
    Yellow= contactor for A/C unit outside
    Green= fan
    white=heat

    heat pump only add
    blue= reversing valve energized in heating.
    Orange=reversing valve energized in cooling
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