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    james3020's Avatar
    james3020 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 10, 2009, 10:36 PM
    Thermostat wiring not labeled
    Honeywell mercury thermostat has no wiring labels cooling has 1- blue 1- red 2- yellow heating has 2-yellow 2- white 1- red. Trying to install hunter digital 44860
    Mikie D's Avatar
    Mikie D Posts: 45, Reputation: 1
    Junior Member
    		  
    #2

    Mar 12, 2009, 06:28 AM

    1st is this a furnace if it is open the wiring panel and read the terminal strip; red is r ( one side of 24v) white is w(heat) c is common other side of 24v(not needed on tstat if batteries are used) Y is yellow (this wire goes from the tstat to the cond usually through the furnace or a/h and the c from furnace goes to cond outside to one side of contactor y on other side oc contactor. Hope this helps Mikie D
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