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

    Apr 30, 2008, 10:32 AM
    Thermostat
    I recently purchased a Robertshaw Thermostat, it is not battery operated, but it is 24 VAC Powered. Well the wiring that comes out of my wall only has 4 wires, but I heard that I need 5 wires to make that thermostat work. Can you let me know if that is true or not. If it is true is there any way I can just use four wires? Please let me know?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Apr 30, 2008, 02:07 PM
    Old thermostat brand and model number?

    New thermostat model number?

    It is a good possibility you will have to add another wire.
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