How To Tell If Your Thermostat Is Bad Or Broken

How To Tell If Your Thermostat Is Bad Or Broken

It feels warm in the house, so you adjust the temperature on the thermostat. You wait for the cool air, but even after several minutes, there’s no change in your home’s temperature. Before you start to panic over a broken AC, take a look at your thermostat.

You may have a thermostat issue if adjusting the thermostat doesn’t change the temperature accordingly.

Do Thermostats Go Bad?

There’s no set lifespan for thermostats. However, most thermostats last around 10 years. After a decade, thermostats may become bad or broken.

Signs Of A Bad Thermostat

  • Air conditioner or heater refuses to start
  • AC runs constantly and won’t turn off
  • Changing batteries did not fix the issue
  • Extreme temperature variation throughout the home
  • No display light or unresponsive interface

How To Check If Thermostat Is Bad Or Broken

The following steps will help you determine the status of your thermostat.

Step 1. Adjust your thermostat five degrees higher or lower than the temperature you usually keep it on. Check to see if the thermostat turns on.

Step 2. Check the thermostat to ensure it is on the correct “COOL” or “HEAT” setting and that the air conditioning setting is in “ON” It could be something as simple as needing to switch to the right settings.

Step 3. If by this step, your thermostat issue is still not resolved, you will need to check the wiring.
Using the breaker, turn off power to your HVAC system. Remove the cover to your thermostat. Make sure wires are securely attached to their screws. Any loose wires or screws will need to be reattached.

Step 4. Power breaker back on and repeat Step 1. If this doesn’t work, turn off power to your HVAC system again.

Step 5. Double check the wires in your thermostat. For difficulties with your air conditioning system turning on, examine the red and green wires. For furnace issues, examine the red and white wires.

Step 6. Unscrew the two wires ( either red and green or red and white) from their terminals and tightly grip so they don’t fall behind the wall.

Step 7. Wrap the two wires together and turn the power back on at the breaker. If your air conditioner’s blower turns on, your thermostat is bad and needs to be replaced.

If you’ve tried all of the troubleshooting options listed above and none of them have corrected, it’s time to replace your thermostat.

Contact Blair’s Air To Replace Your Thermostat

At Blair’s Air Conditioning and Heating, we provide installation, maintenance, and repair services for all of your HVAC needs. We also have a 24/7 emergency line for Pinellas County and South Tampa. If your thermostat is not working properly, let us help you. Remember, you can reach out to Blair’s Air for help at any time! Our trained team of representatives and technicians will be able to inspect your HVAC system and thermostat to determine your best options for optimal indoor comfort. Contact us today!

Call (727) 800-4148 to schedule service.