Thermostat Wiring for Dummies – How Anyone Can Do It White – The white wire is what connects to the (auxiliary) heat on your system. Yellow – The yellow wire connects to your compressor. Green – The green wire connects to the fan. Orange – This wire connects to your heat pump (if you have one). Red – Now, there can be two separate wires for this.Honeywell Wi-Fi Smart · The C-wire Issue · How to Install a Thermostat · Conventional Thermostats Problem: How do I wire up my new thermostat? What do the Hello sir. I recently purchased a new Honeywell Wi-Fi smart thermostat. I noticed on my old White Rodgers thermostat has only four wires red, blue, green, & white . The blue wire is tied to yellow slot of the old Tstat. The Old thermostat has a yellow wire jumper/pigtail that goes to backside of the thermostat to the auto and on.
Related with thermostat wiring red black white green