Honeywell Thermostat Wiring Color Code

With so many new functions appearing on today’s modern thermostats (t-stats), there is of course, many more wires to connect up nowadays, when installing a new or replacement t-stat.  Gone are the two-wire days, when all you needed was one wire from the furnace transformer, and the other to feed power to a gas valve … Continue reading Honeywell 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 … Continue reading 4 Wire Thermostat Wiring Color Code