Why Does My Furnace Keep Turning Off?

November 11, 2019

Has your furnace recently been shutting off shortly after you turn it on? It’s one of the most puzzling and annoying things that many homeowners encounter. When a furnace keeps turning itself off, there’s some sort of problem. If it persists, you could be left in the cold during the winter season. You’re undoubtedly wondering why your heating equipment is behaving this way. In the following article, we’ll discuss three possible issues that may be affecting your furnace.

The Filter Is Clogged or Dirty

A dirty or clogged air filter is the most common cause of a furnace continually shutting itself off. A filter in this condition prevents sufficient air intake, and that obstructs the flow of air to the heat exchanger. When the heat exchanger becomes excessively hot due to poor airflow, the safety mechanism in your furnace shuts the system down to prevent damage.

Locate the filter and check whether it’s reusable or disposable. If it’s reusable, clean it before putting it back into the furnace. If it’s disposable, replace it with a new one.

The Thermostat Has a Problem

If you’ve cleaned or replaced the air filter but the furnace still has the same issue, there’s a good chance that the thermostat is acting up. Inspect the thermostat and ensure that it is set appropriately. If it has been correctly adjusted but your furnace still keeps shutting down, consider enlisting the professional help of Comfort Masters Ltd. in Oshawa. Our experts can resolve the trouble for you.

There’s Soot on the Flame Sensor

Often, a furnace repeatedly shuts off when the flame sensor is caked in soot or corroded. The function of the flame sensor is to detect when your furnace is lit. When it isn’t, the sensor will turn off the gas valve to prevent a harmful concentration from building up. If the sensor is dirty, it simply fails to detect anything and keeps shutting down the system. This is a problem that should only be fixed by a professional.

Whether your furnace keeps shutting off or you have any other indoor comfort concern, rely on the technicians from [company name] to handle the problem. We perform heating repairs, installations, and maintenance throughout the Greater Toronto area, including the York, Durham, and Simcoe regions. We also take care of indoor air quality issues, gas fireplaces, and tankless water heaters. Call us today.