However your connections may seem a little different on the thermostat itself. But here is a list of the most common wire color mappings as seen in many four wire t stat setups.
Honeywell Thermostat Model Rth3100c Manual
Honeywell thermostat wiring diagram 4 wire. Keep in mind that there should be a low voltage cable in the wall where the thermostat is located which has individual wires as shown in the instructions below. C 24 vac common you might see blue purple or brown typically used for this wire. Inspirational honeywell thermostat wiring diagram for rth 3 4 5 wire a beginner s overview of circuit diagrams a first appearance at a circuit representation may be complex however if you can review a train map you can check out schematics. Substitute g wire for c wire install the honeywell wi fi smart thermostat with this video. Some have the common c wire while others do not. The wiring for your honeywell thermostat depends on the functions of your heating and cooling system.
There are only four wires going into the existing thermostat red green blue white. Just take a look at the picture below the diagram. Y yellow wire for cooling enable g green wire controls fan on auto the diagram shows how the wiring works. 4 wire or 5 wire thermostat wiring problem question. Honeywell thermostat wiring diagram 4 wire examples. Youll probably see a thermostat jumper wire connecting the rc and rh terminals.
Nest wiring diagram 4 wires duration. How to replace a 4 wire thermostat. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and coolwhile an air conditioner uses the process of refrigeration to only cool the central air conditioner will usually be paired with a gas furnace an electric furnace or some other method of heating. We have both a natural gas furnace and an ac unit. Typical 4 wire thermostat t stat wiring examples follow. How to wire a honeywell thermostat with 4 wires.
We have a 19 year old condo with an old carrier mercury thermostat. The table above provides a more complete list of honeywell thermostat wiring colors and their uses. The model number of the honeywell thermostat was not provided however here are the typical wiring assignments for a conventional heating system. The red wire or 24 vac power lead is connected straight to the rc 4 terminals. Its there so you can supply power to the heating and cooling switches with a single wire which is usually red. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams.
Both examples of how to wire a honeywell thermostat with 4 wires are discussed below.
Gallery of Honeywell Thermostat Wiring Diagram 4 Wire
