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Tag: A 4 Wire Thermostat

  • 4 Wire Thermostat Wiring Color Code

    4 Wire Thermostat Wiring Color Code

    If you’ve installed more than a few thermostats (t-stats), you likely noticed that many of them use four wires.  See this shown below in the units we’ve wired.  Typical 4 wire thermostat wiring color code examples follow. 4 Wire Thermostat Wiring Color Code In the setups we’ve seen, the most common wire color code guide…