Honeywell pro series thermostat wiring

Known as the common wire, C-Wire provides WiFi thermostats continuous power from heating e. Air Conditioning systems.

Check your thermostat wiring compatibility. Skip to main content. Our Accessibility Statement. How do I wire my thermostat? Last updated. When wiring, each wire should be identified by what terminal s it connects to — never by color.

Honeywell pro series thermostat wiring

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Do you have an unused wire?

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Hide thumbs. Table of Contents. Quick Links. Previous Page. Next Page. Thermostat Honeywell hr90 Quick Start Manual 12 pages. See Figure 1. Page 7: Power Options Before starting, turn the power off at the breaker box or switch.

Honeywell pro series thermostat wiring

Check your thermostat wiring compatibility. Skip to main content. Our Accessibility Statement. How do I wire my thermostat?

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Speak directly with an agent for help with our products. C Label wires Label each the following wires with the stickers provided with your new thermostat: G C R W or W1 not in all systems Y or Y1 If you don't have stickers, you can use tape and a pen. See Step 3 for the color you wrote down. Disconnect only the wires that you labeled. Note: Make sure your wires aren't over-extended or strained. Write down the colors of the wires Check the boxes and write down the color of the wires connected to terminals in the existing wall plate. You won't need to use a C-Wire Adapter. Message us on Twitter for help with our products. Online chat Offline chat. This system is often located in your basement, attic, or garage. Label your unused wire with the "C" sticker provided with your new thermostat.

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Note : You may need a screwdriver to release wires from terminals. A Remove cover from furnace or heating system Open the heating and cooling system's cover to find the control board. You typically have one or two of those three. You should typically see an gauge solid core wire. Your new thermostat may not be directly compatible if you see terminals labeled A B C, or 1 2 3, as your system requires a communicating thermostat. Please view the next section to learn what to do if your thermostat is missing a C-Wire. Do not label these wires. Be sure the cover is completely closed. Note: Turning off your thermostat won't turn off the power to the furnace or heating equipment. Make sure you get a good view of the following terminals, since you may need to reference this image later:. Last updated. B Take a picture of the control panel wiring Make sure you get a good view of the following terminals, since you may need to reference this image later: G C R W or W1 not in all systems Y or Y1 Note : If you have wires connected to two R-Terminals, then you have a two-transformer system and need additional assistance. Thermostats may have a jumper switch, metal staple, or plug. How to check if your thermostat is using a C-Wire. This type of wiring requires a line voltage thermostat and is not compatible with low voltage thermostats.