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    MaryMV1410's Avatar
    MaryMV1410 Posts: 1, Reputation: 1
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    #1

    May 10, 2014, 04:37 PM
    Installing a thermostat with the 3 wires?
    Im installing a new thermostat, there are only 3 wires red, white and green. Am I right that the green wire is for the grounding. What are the red and white for.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    May 10, 2014, 08:16 PM
    Low voltage Control wiring for thermostat. Red to R, white to W. How was the old wiring connected or is this a totally new install.
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