What You Need To Know About AC Thermostat Calibration

Before the weather turns hot, you want to make sure your air conditioner is in good working order. Each part of your air conditioner must work properly for the entire unit to function. Even the smallest part not working will cause the unit to stop blowing out cold air. The thermostat is the brain behind your HVAC system. This is what ensures it runs properly. It may continue to push cold out into the air, but it may not do so efficiently. The thermostat may need calibration to run correctly and efficiently. Continue reading to find out more about air conditioning thermostat calibration.

What is Thermostat Calibration?

When the thermostat is calibrated, it means the sensor it contains reads the temperature in your home correctly. When it is not calibrated, it means it is reading it improperly. For example, the temperature in your home could be 78 degrees, but the thermostat reads 70 degrees. Then, your house does not cool the way you want it to. In addition, your air conditioner will not be efficient and may run constantly. As a result, you will spend more money to cool your house to the temperature you want. This causes a strain on your air conditioning, and you may have repairs as a result. Hire Burkett’s Heating & Cooling for your HVAC related repair with our HVAC contractor in Piqua, OH.

How Often to Calibrate?

It would be best if you had the thermostat calibrated at least once per year. It depends on how many people may adjust your thermostat. If you have it set to a schedule and do not play with it much, calibration once a year should be sufficient.

How to Calibrate

To ensure that your thermostat is functioning properly, you should contact the professionals at One Stop Heating & Cooling. We would be more than happy to meet with you and ensure your thermostat is calibrated and the air conditioning is running properly.

If you want to calibrate your thermostat yourself, there are some steps you must follow.

Check the Thermostat

You want to make sure that the thermostat is the problem. Let your air conditioner run for 15 minutes and use an indoor thermometer to check the temperature in the house. You want to compare it to the temperature on the thermostat. If there are differences by even one degree, then you should calibrate your thermostat.

Clean Thermostat

You must take the cover off the thermostat. Then, carefully use a cloth and soft brush to clean the components inside. You should not use compressed air or a vacuum cleaner to clean the thermostat because the pressure is too much for the internal parts.

Make Adjustments

To ensure a straight mercury vial, use a level. Handle the vial with caution due to its mercury content. Contact One Stop Heating & Cooling for assistance in calibrating your thermostat. Thermostats lacking a mercury vial have a calibration screw within a metal piece. Use the appropriate screwdriver to open and then close the contacts, resetting them for optimal connection.

Wiring Connections

You want to check the wiring in the thermostat. You want to make sure they are clean and without corrosion. You should use a cotton swab to clean any dirt before putting the thermostat cover back on. Double-check the wires before finishing. You can hire Burkett’s Heating & Cooling for HVAC related repair or replacement needs, we also provide AC repair in Piqua, OH and the nearby localities.

Check Thermostat

After cleaning the thermostat, adjusting the mercury vial or calibration screw, and cleaning the wiring, recalibrate the air conditioning by letting it run for 15 minutes. Use an indoor thermometer to take a reading and compare it with the thermostat reading. The temperatures should match. If not, repeat the steps or contact One Stop Heating & Cooling for professional assistance in identifying and resolving the issue with your air conditioning system.


Hire Burkett’s Heating & Cooling, for all your thermostat calibration needs. When the thermostat is calibrated by our expert technicians, it ensures that your home is cooled properly, resulting in a comfortable environment for you and your family. Moreover, an efficiently running thermostat can significantly save you money on your energy bill, as it won’t constantly overwork to maintain what it perceives as the correct temperature in your home.

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