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 Thermostat 4 Wire Wiring Diagram

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



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



Honeywell Smart Thermostat Wiring Instructions

The most “meaty” part of installing a new Honeywell smart thermostat, is correctly wiring it up.  One useful feature about Honeywell t-stats, is that they generally use the same wire labeling as their older models. Today’s WiFi  t-stats still use the R, Rx, C, W, Y1, Y2, et al wires in the same way.  Their … Continue reading Honeywell Smart Thermostat Wiring Instructions



Honeywell Thermostat Wiring Instructions

The most “meaty” part of following the wiring instructions for a new Honeywell thermostat, is correctly connecting it to the HVAC system.  One useful feature about these t-stats, is that they generally use the same wire labeling as their older models. Today’s WiFi  t-stats still use the R, Rx, C, W, Y1, Y2, et al … Continue reading Honeywell Thermostat Wiring Instructions