Honeywell Thermostat Wire Diagram

Yellow the yellow wire connects to your compressor.
Honeywell thermostat wire diagram. R the r terminal is the power. Color of wire and termination. Make sure you have holes in the wall that line up with the holes in the new wall plate. That is a basic honeywell thermostat wiring diagram for a single stage heat pump.
Green the green wire connects to the fan. Prepare for mounting the new thermostat s wall plate. See the diagram below for what each wire controls on your system. It is a red wire and comes from the transformer usually located in the air handler for split systems but you may find the transformer in the condensing unit.
It doesn t control cooling and because it s a mechanical thermostat it doesn t need power for internal functions so it has no c wire. 3 wire spdt honeywell t87f thermostat wiring diagram. The thermostat uses 1 wire to control each of your hvac system s primary functions such as heating cooling fan etc. Learn more about resideo s response to covid 19.
White the white wire is what connects to the auxiliary heat on your system. 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. Find out if your home is compatible with a honeywell home thermostat. Honeywell smart thermostat wiring.
Honeywell thermostat wiring diagram 4 wire examples the table above provides a more complete list of honeywell thermostat wiring colors and their uses. Metal jumper for thermostat rc and rh terminals. Use our helpful tool to take an assessment of the existing wiring in your home. C 24 vac common you might see blue purple or brown typically used for this wire.
Again referring to the honeywell thermostat ct31a1003 wiring diagram you can see it requires only two wires r and w. In our case our new honeywell rth9580wf t stat has identically spaced holes to our old thermostat. May 05 honeywell smart thermostat wiring instructions rthwf the most meaty part of instaling a new thermostat is correctly wiring it up. Orange this wire connects to your heat pump if you have one.
Thermostat wiring and wire color chart thermostat wiring colors code. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 3 wire application as a spdt single pole double throw switch such as used to control low voltage motors electric radiator valves zone valves. Furthermore this thermostat wiring diagram is specifically for a system with two transformers. But here is a list of the most common wire color mappings as seen in many four wire t stat setups.