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Honeywell thermostat not working: Quick Fix

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  • 3 min read

Honeywell is a multinational conglomerate corporation, the main areas of business in which Honeywell operates are aerospace, building technologies, safety productivity solutions and performance materials and technologies. It is also a well-known brand for thermostats in the market.

In this article, we have discussed the causes of the Honeywell thermostat not working and a few ways to help you fix the issue.

What are the causes Honeywell thermostat not working?

Below we have mentioned the possible reasons that might be causing the Honeywell thermostat not working issue.

  • Problem with the furnace.
  • Problem with the thermostat wiring.

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How to fix the issue?

If your Honeywell thermostat is not working then we have mentioned a few fixes below that might help you resolve the issue.

Check the Furnace or Heating system

The thermostat might not be working because there might be some problem with the furnace, check for the following things.

  • Ensure that the breaker to the furnace is turned on, it is located in your home’s circuit.
  • Ensure that the furnace is turned on, the power switch for the furnace is usually located next to the furnace.
  • Ensure that the furnace is closed properly because some systems will not power up until the cover is fully closed.
  • Most of the furnaces have lights that show that there is some error, the light will flash or blink rapidly. Contact the furnace manufacturer if you see any error codes.

Check the Thermostat wiring

To check the wiring of the thermostat remove the face plate and if you have only one wire connected to the either R terminal or Rc terminal then change it to the R terminal and ensure that the connecter between 2 terminals which is also known as the jumper is installed between the R and Rc terminals.

For thermostats with separate O/b and W terminals

Ensure that there is only one wire connected to either W or O/b terminal. If you have a heat pump then change the wire from the W terminal to the W2 terminal.

For the non-heat pump systems

The W terminal controls the heating in gas or oil furnaces or boilers, so make sure that a wire is connected to the W terminal for these systems.

Contact Support

If the above methods do not solve your problem then contact Honeywell support.

Phone no. 1-855-733-5465

Click here to go to the Honeywell support page

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Akash Singh

Akash Singh

Akash is a law graduate who likes to go for bike rides on the weekends soul-searching for answers to his many existential questions. You can contact him here: