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



Honeywell Smart Thermostat Wiring Instructions RTH9580WF

The most “meaty” part of instaling a new thermostat, is correctly wiring it up.  One useful feature about Honeywell smart thermostats, is that they generally support the same wire labeling conventions and hookup techniques as their older, less intelligent counterparts.  Today’s smart thermostats still use the R, Rx, C, W, Y1, Y2, et al wires in the same … Continue reading Honeywell Smart Thermostat Wiring Instructions RTH9580WF