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How to Wire a Honeywell Thermostat


By Dave Rongey - Summary:

How do I connect the wires for a heater thermostat? Wiring Instruction Heating Thermostat, Typical Thermostat Wiring for Furnace Heating and Air Conditioning.

Wiring Guide for a Honeywell Thermostat

Electrical Question: How do I connect the wires for a heater thermostat?

This electrical wiring question came from: Pamela, a Handy woman from Brockton, Ma.
Additional Comments: Great!

Dave’s Reply:
Thanks for your electrical wiring question Pamela.

Wiring Instructions for a Honeywell Heating Thermostat

Application: Wiring a Honeywell Thermostat.
Skill Level: Beginner to Intermediate.
Tools Required: Basic Electricians Pouch Hand Tools.
Estimated Time: Depends on personal level experience and ability to work with tools.
Precaution: Identify the furnace or air conditioning circuit, turn it OFF and  Tag it with a Note before working with the wiring.

Typical Thermostat Wiring for Furnace Heating and Air Conditioning

Terminal  Label –    Wire Color  –   Function /Description

NOTE:
Although many home heating and air conditioning systems have a standard type thermostat cable with color coded wires, the wires should be identified to make sure of the exact purpose for each wire.

More about Wiring a Thermostat

More about Thermostat Wiring

More about Replacing Honeywell Thermostat



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FAQs Frequently Asked Questions and Comments

3 Responses to “How to Wire a Honeywell Thermostat”
  1. Dave Rongey says:

    Hi Allen,
    If the fan is working from the manual fan switch on the thermostat then one of the components of the heating system may be faulty. There are several events that must take place before the control board will allow the heating process to begin. Each of the components are monitored by sensors, such as the exhaust discharge fan, and limit switches. If any one of these components or sensors are not working properly, or if the main control board is faulty then the heating cycle will not be triggered to start. This problem will require specific testing and troubleshooting of your furnace to locate the problem and then make the necessary repairs.
    I hope this helps,
    Dave

  2. ALLAN HURST says:

    I HAVE ALL THE WIRING HOOKED UP PROPERLY, THE FAN WORKS BUT THE THERMOSTAT WILL NOT TURN ON THE HEAT. WHAT SHOULD I DO?

  3. Don says:

    A simple electronic schematic for a heat cool thermostat would be nice.