Thermostat Reading the Wrong Temperature?

October 2, 2019

Do you suspect that the temperature shown on your home thermostat may be inaccurate? You may be surprised to learn that it is a common problem, but it can often be a frustrating issue when the difference is just a few degrees. Here are a few reasons why incorrect thermostat readings happen.

Inadequate Placement

Southern Comfort Mechanical is an award-winning HVAC company that serves residential customers in Lewisville and throughout the surrounding areas. When it comes to inaccurate thermostat readings, poor positioning within the home is the leading cause. Even too much sunlight can affect the measurement.

Dirty Contacts

Whether you have an electromechanical or electronic thermostat, it can have contacts, coils, and metal strips. Dust can build upon those areas and cause the readings to be off. For this reason, it is a good idea to remove the cover every several months or so and gently clean the components.


Some thermostats need to be level. This is most common with the older thermostats that use mercury, but even some newer units are like this. In this case, even bumping into it can knock it off level. Level the unit again, and then, consider upgrading to a product without this disadvantage.

Bad Sensor

If you have a modern electronic thermostat, the computer chip may fail, at which point the unit has to be replaced. Although less common, it is possible for a sensor component to falter, rather than fail, and give bad readings.

Mismatched Equipment

Many modern thermostats are universal and can be set into various modes to support the equipment in the home. But it is possible to mismatch certain thermostats to certain HVAC systems, and one of the potential symptoms of such miscommunication is a bad reading.

Contact Us Today

Southern Comfort Mechanical in Lewisville is here to help if you believe that your thermostat readings may be inaccurate. You can also count on us for a wide range of services related to cooling, heating, indoor air quality, and insulation. Call us at your convenience or contact us online.

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