Doing Your Part to Keep Your HVAC System Running

A few months ago, my air conditioner completely died. I woke up in the middle of the night covered in sweat, and I didn't know what to do. The next day, I called an HVAC expert, and they came out to inspect my system. It turned out that it had failed because of filthy filters and a clogged return duct, which made me sick to my stomach. I had caused the problem, and I needed to learn how to fix things. My HVAC professional taught me a few easy maintenance techniques that I didn't know before, so that I could maintain my new system. Check out this blog to learn more about HVAC yourself.

Four Reasons Your Air Conditioner Will Not Power Off


When the temperature heats up outside, ensuring you have a nonstop delivery of cool air inside your home is the goal. However, while a home should remain consistently cool, the air conditioner should not stay on constantly. More often than not, when a unit fails to power off, there is a malfunction that should be addressed.

Thermostat Error

The thermostat is responsible for sending a signal to the air conditioner when the desired temperature has been achieved. When a thermostat is faulty, it will not sense the temperature correctly, which can result in it reading an air temperature higher than it actually is. As a result, the unit will remain on because it has not sensed that the desired temperature has been achieved. 

Failed Contactor

A contactor plays a role in the delivery of electricity to and from the unit, as it monitors the flow of electricity. When the contactor works correctly, it will cause electricity to stop flowing to the unit so that it can power off. If the contactor fails, it may be unable to properly manage power flow, which could result in it being unable to shut off the electricity flow to power down the unit. As a result, it would just remain on.

Improperly Sized

If you recently installed a new air conditioner unit, the reason for this issue could be the size of the unit. Cooling units are sized to accommodate a home based on its square foot and design. For this reason, purchasing a unit meant to cool a 3,500-square-foot home when your home is just 2,000 square feet, for example, will result in the unit short cycling. Consequently, it will power right back on almost as soon as it turns off. 

Frozen Coils

For people who experience an air conditioning unit that does not turn off, as well as one with a steady flow of warm air from their vents, frozen coils could be to blame. The evaporator coils remove the hot and warm air from the air that flows into the unit so that it can be cooled. If the coils freeze, not only will they not remove the hot and moist air, but they will also force the unit to remain on as it attempts to lower the air temperature. 

If your air conditioner unit is not powering off, or you have another repair need, contact an AC repair professional to learn more.


28 July 2023