4 Common Thermostat Problems and How to Fix Them

Do you want to improve your home’s energy efficiency but need to know which thermostat problems to solve first? Don’t worry! We will discuss the four most common thermostat problems and how to fix them.

1. Not Showing the Correct Temperature

It’s easy to fix a thermostat that isn’t displaying the right temperature. It usually occurs when the thermostat is not correctly calibrated or when there is dust or debris inside the device. The problem may be related to the age of the thermostat or simply due to incorrect installation.

The best way to diagnose this issue is first to check the thermostat’s calibration by reading the manual with the device and following the steps outlined therein. If the problem persists, it is likely a problem with the wiring or connections in your home. You may need a professional service to investigate and fix potential wiring issues.

2. Not Turning On/off Correctly

Incorrect settings on the device usually cause the issue. Thermostats work by sensing the room’s temperature and turning on your HVAC system when the temperature drops below a set point. If the thermostat still isn’t turning on/off properly after adjusting the settings, it may malfunction due to dirt and dust build-up.

Regularly cleaning and replacing filters will help prevent all sorts of problems with your device, including turning it off and not coming back on again. If cleaning doesn’t resolve the issue, you may need to replace the thermostat entirely with a more modern model that better fits your needs. 

3. Inconsistent Temperatures in Different Rooms

The problem can manifest itself in various ways, from one room consistently being warmer or colder than other rooms to temperatures fluctuating wildly throughout the day. Different occupants may have other preferences, and the thermostat might not have been set with everyone’s comfort in mind. 

Poor circulation might also cause this issue; if warm air is not adequately circulating throughout the house, some rooms will inevitably be warmer or colder than others. It’s worth double-checking that the thermostat has been properly installed on an interior wall away from direct sunlight, drafts, and other heat or cold sources. 

4. System Runs Continuously Without Ever Shutting Off

It usually occurs when the thermostat has been set to a temperature higher than the actual temperature in the home, resulting in the system running constantly. If the system is left like this for an extended time, it can lead to excessive strain on the HVAC unit and higher energy costs. You’ll want to test each of the two sensors on either side of the thermostat. If any of these tests fail, then it’s likely that you will need to replace the thermostat. 

If none of these solves the problem, it could indicate that a more serious issue is at hand. In this case, it is best to contact the professional HVAC technicians at Legacy Heating & Cooling who can inspect your system and diagnose the source of the problem before attempting any repairs.


Knowing when to fix the problem or call Legacy Heating will save time and money by preventing further issues from occurring in your home. A basic understanding of thermostat troubleshooting will prove helpful. Finally, having a professional inspect your equipment regularly will help ensure that your thermostat stays in working order and functions as it should.

Are you looking for an HVAC maintenance and repair service in Calgary and Edmonton? Check out Legacy Heating! We service any brand or model of HVAC unit. Each of our furnace repair specialists has the necessary training and experience to solve any issue you’re having. Contact us today!

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