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

    Aug 9, 2016, 08:11 PM
    3 wire thermostat for cooling - replace with programmable t'stat
    I have an old honeywell round t'stat w/3 wires and want to replace it with a programmable t'stat.

    How do I wire
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Aug 10, 2016, 06:15 AM
    Read the instructions for the new stat. You probably have red, white and 1 other color.
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