How Long Do Thermostats Last?

Thermostats are one of the most critical components of a heating and cooling system in your home or business premises. A thermostat helps to regulate the temperature inside your building, but like with any other device, it also has a designated lifespan. So, how long do thermostats last, and what determines their life expectancy?

The Lifespan of a Thermostat

The lifespan of a thermostat is dependent on several factors, including the type of thermostat, usage, and maintenance. On average, most thermostats last about 10 years, depending on the model, usage, and proper maintenance. However, many people decide to replace their unit sooner to take advantage of new energy-saving technologies.

Factors Affecting the Lifespan of Thermostats

Type of Thermostat

The type of thermostat is the first factor that determines how long it lasts. There are various types of thermostats, including mechanical and digital or smart thermostats. 

Mechanical thermostats utilize bimetallic strips to control temperature and are known for their durability. Digital and smart thermostats utilize microprocessors, which makes them more advanced and accurate than a mechanical thermostat. However, they are less durable and might require more maintenance.


The location and exposure to heat of a thermostat can have a significant impact on its lifespan. Thermostats that are installed in areas with high levels of heat and humidity will likely experience more wear and tear, leading to a shorter lifespan.

In particular, thermostats that are exposed to direct sunlight can also suffer a shorter lifespan due to the excessive heat and UV radiation they are exposed to. This can cause the internal components of the thermostat to expand and contract, leading to cracking or other forms of damage.

Similarly, thermostats that are located near heat sources such as radiators or ovens can also experience a shorter lifespan due to sustained exposure to high levels of heat.

It is important to note that different types of thermostats may be more or less susceptible to heat damage. For example, mechanical thermostats may be more durable than electronic thermostats in high-heat environments.


Another significant factor that determines the lifespan of your thermostat is maintenance. A well-maintained thermostat is bound to last longer than one that is neglected. It is recommended that you clean or replace your air filters regularly. Dust and debris that get into the heating and cooling system can cause the thermostat to malfunction. Also, ensure that the wiring is tightly connected and in good condition.

Caring for Your Thermostat

To extend the lifespan of your thermostat, it is recommended to install it in a location that is out of direct sunlight and away from heat sources. Additionally, regular maintenance and cleaning can help ensure that the thermostat is functioning properly and is less susceptible to damage from environmental factors.

To ensure that your thermostat lasts longer, it is essential to provide proper care. Here are some tips to help you keep your thermostat in good condition:

Regular Maintenance

To maintain your thermostat, it is important to ensure that it is clean and free of any dust or debris. A dirty thermostat can affect its accuracy and efficiency in regulating temperature. Clean the thermostat regularly with a soft cloth or brush to keep it in good condition. 

Another aspect of maintaining your thermostat is to replace the batteries regularly as indicated by the manufacturer. Dead batteries can result in a thermostat malfunction, which can lead to discomfort and increased energy costs. 

Always check the wiring of your thermostat to ensure it is tightly connected, and any signs of wear and tear are addressed early.

Additionally, it is recommended to schedule regular HVAC maintenance visits from a professional technician throughout the year to inspect and clean your thermostat, as well as other components of your heating and cooling system. Proper maintenance of your thermostat ensures that it functions efficiently, saves energy, and keeps your indoor environment comfortable.

Avoid Environmental Factors

Environmental factors such as direct sunlight, dust, and moisture can significantly affect your thermostat’s lifespan. Ensure that your thermostat is installed in a safe and secure location and is not exposed to direct sunlight. It is also essential to control indoor humidity levels to prevent the accumulation of moisture in your thermostat.

Avoid Constantly Changing Thermostat Settings

Changing your thermostat settings frequently can also wear it out and affect its lifespan. Therefore, it is essential to set your thermostat at a specific temperature that you are comfortable with and leave it there if you have a manual thermostat. 

If you have a programmable thermostat, learn how to properly program it so you don’t have to manually change the settings often. This will also help you take advantage of your thermostat’s full energy-saving potential.

Is It Time for a New Thermostat?

How long thermostats last depends on various factors such as type, usage, and maintenance. It is essential to care for your thermostat by providing regular maintenance, avoiding environmental factors, and setting it to desired temperature settings. 

At Grove Heating & Cooling, we offer thermostat replacement services that can ensure that your heating and cooling systems remain in good operating condition. If you need a thermostat replacement, please get in touch with us today.

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