Honeywell Thermostat Wiring Diagram 4 Wire

With so many new functions on today’s thermostats (t-stats), 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 … Continue reading Honeywell Thermostat Wiring Diagram 4 Wire



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 with 4 wires … Continue reading How to Wire a Honeywell Thermostat with 4 Wires



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



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 … Continue reading Honeywell Smart Thermostat Wiring Instructions RTH9580WF