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



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