Troubleshooting Honeywell Thermostat Problems

Honeywell Thermostat Not Working

Is your Honeywell thermostat not working at all? This can be a frustrating problem to deal with. Luckily, you can take some easy steps to try to fix the issue.

Test The Honeywell Thermostat Settings

First, if you have an analog Honeywell thermostat, you can test the settings to ensure it’s set up correctly. When looking at your thermostat, you’ll notice there is one switch for heat, cool, and off; and there is a second switch for powering the fan. To try and solve the problem, turn on the heat setting and crank the temperature up to see if the system does anything. If it does power on, you’re in luck.



Now it’s time to test your air conditioning. Change your thermostat to the cool setting and turn the fan to auto. Then, turn the temperature down and wait a few seconds. If you hear the system working, you’re good to go! If not, there could be another issue going on.

Examine The Inside Of The Unit

If your thermostat isn’t working at all, there could be a problem internally. You could examine the inside of the thermostat to see if there is an issue. First, head over to your electrical breaker box and turn off the power source to your thermostat. Next, turn the thermostat off and carefully remove the top cover of the unit. Look at the wiring and check if anything is loose, broken, or disconnected. Also, check to see if everything is clean.

 If the inside of your thermostat is filthy or there is loose wiring, that could be your problem. If you don’t find any issues under the cover, there could be something going on with your HVAC system, or you could be due for a thermostat replacement.

Display Screen Is Blank

Another common problem is a display screen that appears blank when everything is powered on. Luckily, there are a few Honeywell thermostat troubleshooting tips that can help.

If your digital thermostat doesn’t display anything at all, leaving you with a blank screen, you could have dead batteries. Replace your batteries to see if that helps.

If that isn’t the issue, the problem could lie with your HVAC system. Your screen could appear blank if an access door on your HVAC unit isn’t closed completely. When these doors are closed, a switch is activated that allows the unit to work. If a door is open, this switch isn’t turned on, which means the system won't work. Be sure to examine your unit and make sure all access doors are closed.

It's also possible that you have a tripped circuit breaker. This can also cause your thermostat to display a blank screen. As HVAC units tend to have their own circuit breaker, be sure to examine this to make sure the switch is set to the right position.

Honeywell Thermostat Won't Turn On Heat

Is your thermostat not maintaining heat in the home? Or does your thermostat not turn on heat at all? In this case, check your batteries if your display screen is blank. If your display screen is working, examine your wiring to see if there are any issues.



Another tip is to make sure your thermostat is completely level. If it isn’t, the mercury switch in your thermostat could lead to an incorrect temperature reading. This can cause your system to continually power on and off. To try and fix the issue, make sure your thermostat is 100% level.

Thermostat Reading Doesn’t Match Actual Temperature

Is your Honeywell thermostat not cooling? Or does it seem like the temperature reading doesn’t match the actual indoor temperature? In this instance, there could be an issue with the temperature sensor. To troubleshoot the problem, grab a thermometer and measure the actual temp near your thermostat.

If these temps don’t align, you may have a sensor issue. You can either replace the broken sensor or buy a new thermostat.

Always Choose A Trusted HVAC Service Provider

With how advanced Honeywell thermostats have become, trying to troubleshoot these problems can be confusing and frustrating. No matter what issue you're having with your HVAC system or any of its equipment, calling an HVAC professional can be a very smart decision.

Here are the dangers of working with your HVAC equipment:



• Electrical shock
• Damaging the system
• Causing injury
• Making the issue worse
• Causing another problem
• Voiding your system’s warranty

While it’s not dangerous to change batteries or make a small adjustment to your thermostat, working within your HVAC system and its electrical components can pose many risks. If you ever don't feel comfortable troubleshooting your thermostat or HVAC system problems, we highly advise calling an HVAC professional. They know exactly what they’re doing and can diagnose the problem quickly.

To try and avoid thermostat problems in the future, pay attention when your thermostat is first installed. Learn how to set Honeywell thermostat, and you can maybe even ask how to solve some common thermostat problems. Additionally, there should be a manual that comes with your Honeywell thermostat, and that booklet should have a section regarding Honeywell thermostat troubleshooting. This can be a great resource when trying to solve these problems.

If you're constantly dealing with thermostat issues, it may make sense to buy a replacement. This equipment wears down over time, and a new model may bring many advantages. In fact, as your ineffective thermostat was possibly causing poor energy efficiency, a new thermostat could bring tons of savings on your energy bills.