Today’s thermostats have so many new functions. So there are many more wires to connect up when installing a new or replacement t-stat. Gone are the two-wire days. In those times, all you needed was one wire from the furnace transformer. Plus, you had another to feed power to a gas valve or relay to … Continue reading Honeywell Thermostat 4 Wire Wiring Diagram
Tag: 4 Wires
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 (t-stat) wiring examples follow. Some have the common (C) wire, while others do not. Both examples of how to wire a Honeywell thermostat … Continue reading How to Wire a Honeywell Thermostat with 4 Wires