How to Wire a Honeywell Thermostat with 4 Wires

If you’ve installed more than a few thermostats, you’re likely to have come across many that utilize four wires, as shown below in the units we’ve hooked up.  Typical 4 wire thermostat wiring examples follow.  Some have the common (C) wire, while others do not.  Both examples are discussed below. In the installations we’ve encountered, the most common … Continue reading How to Wire a Honeywell Thermostat with 4 Wires



4 Wire Thermostat Wiring Color Code

If you’ve installed any more than a few typical thermostats, you’re likely to have noticed that many of them utilize four wires, as shown below in the units we’ve hooked up.  Typical 4 wire thermostat wiring examples follow. In the installations we’ve encountered, the most common wire color code guide for a four wire thermostat … Continue reading 4 Wire Thermostat Wiring Color Code