Honeywell pro series thermostat wiring

Known as the common wire, C-Wire provides WiFi thermostats continuous power from heating e. Air Conditioning systems. C-Wires are required on all Resideo WiFi thermostats. For full thermostat wiring assistance: Click here.

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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Online chat Offline chat. Review the steps below.

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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? Last updated. When wiring, each wire should be identified by what terminal s it connects to — never by color. The thermostat uses one wire to control the primary functions of your HVAC system, such as heating, cooling, and fan. Follow the instructions below to guide you through basic wiring: To protect your equipment, turn off the power at the breaker box or switch that controls your heating and cooling. To confirm your system is off, change the temperature on your existing thermostat, so the system starts heating or cooling. You can skip this step if you have a digital thermostat with a blank display.

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Do not label these wires. Contact Support at to find a pro-installer. Note : If you have wires connected to two R-Terminals, then you have a two-transformer system and need additional assistance. For your safety, turn off power at the breaker box or switch that powers your furnace or air conditioning. What should we do to improve this article? A Remove cover from furnace or heating system Open the heating and cooling system's cover to find the control board. Thanks for your feedback! Online chat Offline chat. Remove your existing thermostat Take thermostat off wall plate but leave wires connected. You can purchase a C-Wire Adapter here.

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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. Open the heating and cooling system's cover to find the control board. On the C-Wire Adapter's "Equipment" side, connect the wires to the corresponding terminals on the control board. Do not label these wires. Note : You may need a screwdriver to release wires from terminals. Note: Make sure your wires aren't over-extended or strained. Please scroll to the C Wire Adapter section further below. 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. I Close the cover to the furnace or heating system Be sure the cover is completely closed. Review your picture and confirm. Note: If you have multiple unused wires, then label only one wire and make note of the color. If you have a C wire, place it into the C terminal on your wall plate. When wiring, each wire should be identified by what terminal s it connects to — never by color.