Honeywell Thermostat Backlight Not Working: How to Fix

If your Honeywell thermostat backlight is not working, there are several things you can try to fix it:

  • First, try restarting the thermostat.
  • If your thermostat has an internal battery, change the battery at least once a year.
  • You can also try wiping the thermostat housing with a soft cloth.
  • If your thermostat is battery-powered, dead batteries might be the issue.
  • You can also check the wiring and connections to make sure everything is properly connected.

If none of these solutions work, it may be time to call a professional to check and fix the faulty backlight.

Tips to troubleshoot Honeywell Thermostat Backlight Problems

Restart the Thermostat

To restart a Honeywell thermostat, you can follow these general steps:

  • Confirm that the thermostat is on.
  • Press and hold down the MENU button for 5 seconds.
  • Use the scroll buttons to move to RESET. The button should lead to left scrolling.
  • Select the RESET option and confirm.

However, it’s important to note that each model of Honeywell thermostat may have a different reset mechanism.

For example, for the Honeywell T9 thermostat

You need to press the Menu icon, scroll down to “Wi-Fi,” select “Change Network,” and select the new Wi-Fi network and enter the password.

For the FocusPro 6000 thermostat

You need to press and hold the Fan and Up buttons, change the number on the left to 90 and the number on the right to 1, and press Done.

Check and Replace the Batteries

To check and replace the batteries in a Honeywell thermostat

  • You need to first switch off the thermostat and isolate the circuit as a precaution
  • Then, gently pull the cover plate off from the base plate
  • For thermostats that require batteries, you can find them within the control panel
  • Some models use battery compartments, while others require removing the faceplate
  • Once you have access to the batteries, replace them with two new AA or AAA batteries.

Check the Circuit Breaker

To check the circuit breaker for a Honeywell thermostat, you need to locate the circuit breaker box in your home.

Once you find it, look for the breaker that controls the thermostat and check if it has tripped.

If it has, switch it off and then back on again to reset it. If the circuit breaker keeps tripping, it may be a sign of an electrical issue and you should contact a professional electrician to inspect and fix the problem.

Check for Wiring Problems

To check for wiring problems in a Honeywell thermostat

  • You need to first turn off the power source to the thermostat from the electrical breaker box.
  • Then, turn off the thermostat and carefully remove the top cover of the unit to access the wiring.
  • Look at the wiring and check if anything is loose, disconnected, or damaged.
  • You can also check if your thermostat has any guided assistance written on the inside of the cover.

If you find any issues with the wiring, you may need to call a professional electrician to fix the problem.

Why is my Honeywell thermostat display blank?

When a Honeywell thermostat display goes blank, it is likely due to one of two problems.

The first problem could be an issue with the power supply, such as dead or low batteries. The second problem could be one of the thermostat’s safety features that has triggered.

To fix the issue, you can try replacing the batteries. You can also check whether the display screen is really not working and adjust the brightness levels. If you have a Lyric thermostat, you can check if it has AC power by looking at the wiring.

If none of these solutions work, it may be time to call a professional to check and fix the faulty display.

If your Honeywell thermostat heating or cooling system does not respond, there are several things you can try to fix it.

First, check if the thermostat is turned on and set to the correct temperature. Then, go to your home’s circuit breaker and make sure the breaker to the furnace is turned on. Verify that the furnace door is securely closed and that the furnace’s power switch is set to On.

Make sure the furnace circuit breaker switches are on. You can also try turning the dial to the lowest setting and wait for 5 minutes to check if the air conditioner unit kicks in.

If none of these solutions work, it may be time to call a professional to check and fix the faulty system.

If your Honeywell sensor is not connecting, there could be several reasons for it.

First, try resetting the sensor by pressing and holding the Connect button on the sensor for about 15 seconds.

Then, with the sensor within 2 feet of the thermostat, try adding it again. If you’re still having issues, replace the sensor batteries and retry.

It’s also possible that there is an issue with the power supply or wiring. Check the power supply and make sure the furnace circuit breaker switches are on. If you just installed your Honeywell thermostat, there could be a wiring problem.

If none of these solutions work, it may be time to call a professional contractor for support.


Leave a Reply

Your email address will not be published. Required fields are marked *