Why Does My Furnace Keep Turning Off?

Having a furnace that constantly turns off will keep your property from being sufficiently heated. In addition, it can be doing damage to your furnace. You may wonder why this malfunction is occurring and what you can do about it.

Your Furnace Is Too Big for the Space

Furnaces are rated by how much heat they can produce in an hour. Assessing the size of your property and how well insulated it is will determine what size unit you require. If your furnace is too big, it will heat up your area quickly and then turn off.

Inadequate Airflow Through Your Furnace

A dirty air filter, a dirty blower wheel, or too many closed heat vents can all restrict airflow into and through your furnace. An inadequate flow of air will cause the furnace’s heat exchanger to overheat. When the heat exchanger heats up beyond a specified temperature, your furnace will turn off. After it cools, your furnace will start back up only to turn off again once the heat exchanger overheats again.

It’s important to periodically swap out dirty air filters. Make sure all of your heat vents are open and unobstructed. Have a trained technician clean the blower wheel and check for damage.

A Faulty Flame Sensor Will Keep Turning Your Furnace Off

Your fuel-powered furnace has a flame sensor to let the furnace’s controller know if a flame is present. If the flame goes out, the sensor will let the controller know and the fuel to the furnace’s firebox will be shut off. If fuel is being fed to the furnace while there is no flame, an explosive situation can occur.

If the flame sensor is dirty or malfunctioning, it will not detect a flame. This false information will turn off the furnace. After a short period, your furnace will restart. But since the flame sensor cannot detect the flame, your furnace will soon turn off again. A skilled technician from BELOMAN in Belleville, IL, can check the flame sensor to see if it is working correctly. If there’s a problem, we can either clean or replace it.

BELOMAN is an award-winning company that has been in business for 60 years. Our competent and factory-certified technicians can help you diagnose, repair, and maintain your heating and cooling systems. We also provide plumbing and architectural metalwork services. Call us today.