Signs That Your Thermostat Has Issues and How to Fix Them

Has your thermostat been displaying abnormal readings lately? Or are you having trouble keeping your home’s temperature consistent? It could be a sign that your thermostat is malfunctioning. 

There are a few things you can look for that may indicate your thermostat isn’t working right. This article will explore the potential causes of the problem and how to troubleshoot the issue.

1. Thermostat Displays the Wrong Temperature 

If your thermostat displays the wrong temperature, here are a few possible reasons.

The Batteries Are Low  

If the batteries in your thermostat are running low, it can prevent the thermostat from properly controlling the temperature in your home. If that’s the case, simply replace the batteries and see if that fixes the problem.

The Thermostat Is Not Set to the Correct Temperature

You can easily fix this by adjusting the thermostat to the desired temperature.

The Thermostat Is Not Calibrated Properly

This can happen if the thermostat was installed incorrectly or if it was moved after being installed. If it is not calibrated correctly, it will not be able to read the temperature in your home accurately. This can cause the thermostat to use more power than necessary, draining the batteries faster. If this is the case, you’ll need to recalibrate the thermostat.

The Thermostat Is Dirty

Dust and dirt can build up on the sensors, causing the thermostat to give inaccurate readings. Simply cleaning the thermostat can often fix this problem.

The Thermostat Is Faulty

If none of these solutions work, it’s possible that the thermostat itself is faulty. In this case, you’ll need to replace the thermostat. 

2. Your Thermostat Is Making Strange Noises

If your thermostat is making strange noises, it is likely due to a heating or cooling system problem. The first thing you should do is check the thermostat’s batteries. If the batteries are low, replace them. 

If the noises persist, you should consult a heating and cooling technician to diagnose and repair the problem.

3. The Display on Your Thermostat Is Flickering

If the display on your thermostat is flickering, it could be a sign that the thermostat is malfunctioning. Here are a few things why.

Loose Connection

If the wire that connects the thermostat to the wall is loose, it can cause the display to flicker. Tighten the connection to see if that fixes the problem.

Problem with the Power Source

If the thermostat is plugged into an outlet that isn’t working properly, the display may flicker. Try plugging the thermostat into a different outlet to see if that solves the problem.


If the display is still flickering, it’s possible that the thermostat itself is faulty. In this case, you’ll need to replace the thermostat.

4. Your Thermostat Is More Than 10 Years Old

If your thermostat is more than ten years old, it may be time to replace it. Older thermostats can become less accurate, making your home too hot or too cold. They may also not have features that newer thermostats have, such as energy-saving modes or the ability to control your home’s temperature from your smartphone.

If you’re unsure how old your thermostat is, check the manufacturer’s website or the user manual. If you can’t find either of these, you can usually find the date of manufacture on the back of the thermostat.


If you think there might be something wrong with your thermostat, it’s important to check for signs of problems so you can try to fix them. If you’re still having trouble, it may be time to call a professional. A professional can help you figure out the root cause of the problem and help you get your thermostat working properly again.

Looking for the most efficient and cost-effective HVAC products available in Edmonton and Calgary? Legacy Heating will ensure that your new home is equipped with the best HVAC system. We also offer reliable residential heating and cooling service, like HVAC maintenance, repair and more. Contact us today and schedule a free quote!

HVAC Brands We're Proud to Carry

Legacy only uses the most efficient and cost-effective HVAC products. We pride ourselves on putting quality and customers first! We will equip your new home with the best HVAC system and offer the most reliable residential heating service in Edmonton and Calgary.

Contact Us Today

We’ll help you find the right heating and air conditioning system for you and your budget.

Edmonton Area 780-733-1256 Calgary Area 403-451-1337

Honesty, Integrity, Legacy