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    Lefty21's Avatar
    Lefty21 Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Apr 28, 2012, 01:47 PM
    Thermostat question
    I have 2 white wires leading to my t- stat, how can I tell which one controls heat
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Apr 28, 2012, 01:58 PM
    If you only have two then it's both.
    You can't have more than one function with only two wires.

    Red and white I assume?
    Lefty21's Avatar
    Lefty21 Posts: 5, Reputation: 1
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    #3

    Apr 28, 2012, 02:01 PM
    I have 2 white, 2 blue and 1 red. Don't know which controls heat or a/c.
    Lefty21's Avatar
    Lefty21 Posts: 5, Reputation: 1
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    #4

    Apr 28, 2012, 02:14 PM
    Thermostat
    Can I connect heat without fan
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #5

    Apr 28, 2012, 02:18 PM
    Then sorry, but I have no idea. That is an odd combination.
    I'd have to see where they go and how they are terminated.
    Lefty21's Avatar
    Lefty21 Posts: 5, Reputation: 1
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    #6

    Apr 28, 2012, 02:22 PM
    Red, white and blue go to furnace... and blue and white go a/c... is there a way to test which wires control heat
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