6 Signs You Need to Replace Your HVAC’s Thermostat

Your HVAC system is an important part of your home because it can keep you cool in the summer and warm in the winter. With that, you need to make sure your HVAC is running efficiently, which means all of its parts and components must work well. 

A vital part of your HVAC system is the thermostat. Any issues with the thermostat must be addressed immediately; otherwise, it could cause bigger problems to the entire system. 

Here are signs you need to replace your HVAC’s thermostat

HVAC Keeps Turning On/Off

Your HVAC’s thermostat communicates with the system as it sends signals to it to either increase the temperature or lower it. If your HVAC has stopped taking these prompts from the thermostat, it could be because there’s a problem with your thermostat. 

In most cases, the wiring in the thermostat can be damaged or frayed, compromising its connection to the system. It’s best you leave this issue to the experts. 

Faulty Readings

Thermostat readings must be correct at all times because this allows you to ensure that the area doesn’t get too hot or cold. However, when your thermostat starts to deliver inaccurate readings, then it may be time to get a new one. 

Test the reading with a portable indoor thermometer to verify the temperature. If the readings are wrong, the thermostat’s sensor is likely malfunctioning due to several reasons, such as old age, misuse, or manufacturing defect. 

High Energy Bills

Are you shocked with this month’s energy bills? Your HVAC system can impact your energy bills. If your HVAC system is not working well, then it could drive your energy costs up. Many times, the culprit is the thermostat. For example, when it’s not giving accurate readings, it will cause your system to overwork; hence, the higher energy bills. Keep in mind: the more times the unit cycles per hour, the higher the power it consumes. 

Continuous Temperature Shifts

An issue with your thermostat may cause it to struggle in maintaining settings. In most cases, the temperature will continuously change without warning. When this happens, try lowering the thermostat settings for a test trial and see what happens. If the same problem occurs, it’s time to get professional help. 

Old Thermostat

Over time, your thermostat will become outdated. Generally, the lifespan of a home thermostat is 10 years. However, there are some cases when you replace it sooner than you think. With new and efficient thermostats on the market today, it’s tempting to replace an older version, even if it’s working. 

Failure to Respond to Changed Settings

If you adjust your temperature settings and your thermostat doesn’t respond promptly, then it’s likely it’s no longer working well. Your thermostat adjustments must come on the moment you make the changes. 


If you have any of these issues with your HVAC’s thermostat, it’s time to replace it. However, you can always seek the help of a professional first to assess the situation before you purchase a new thermostat. A HVAC professional can help you through the process and ensure your system and thermostat are working properly. 

Legacy Heating and Cooling in Edmonton, AB specializes in HVAC systems for residential homes. We also have a selection of quality HVAC products. Get a free quote today!

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