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Why Does the Furnace Keep Shutting Off and Back On?

Why Does the Furnace Keep Shutting Off and Back On?

It can be very alarming when you realize that your furnace isn’t acting as it should. Why does the furnace keep shutting off and back on? There are many potential answers to this phenomenon, which is commonly known as “short cycling”.

Here are a few ways you can determine the cause.

Check Your Furnace Filter

Your air filter has multiple purposes. Not only does it help with your indoor air quality, but it also helps keep your furnace clean. If your furnace is short cycling, your first action should be to check your air filter. If it looks dirty or clogged, it’s probably negatively impacting your airflow. Good airflow over your heat exchanger is essential for proper system performance. While the simplest answer for your furnace shutting off and then back on repeatedly, a dirty air filter is also the most common.

Look at Your Thermostat

It’s easy to set and forget when it comes to your thermostat, especially if you are using a programmable thermostat. Take a look at your thermostat to see if anything is functioning improperly. The issue could be simply that it needs new batteries. A bad location can also be the root cause of your troubles if it is in a place that is a different temperature than the rest of your home.

Check Out Your Windows For Proper Insulation

Old or inadequate insulation can cause your furnace to shut off more frequently. Take a look around your house to check to see that there are no forgotten about open windows. Also examine the seals around the windows where any cold air could enter.

Consider Your Heat Exchanger

A lack of airflow can cause your heat exchanger to overheat, which then causes your furnace to short cycle. The high limit switch on your furnace will trip when the heat exchanger overheats. This protects your furnace by shutting it down.

If you are overwhelmed by the issue, Grogg’s Home Services is here to help. Short cycling causes stress on your system, which frequently leads to pricey repairs or even a total breakdown.

We are happy to assist you! We would like you to enjoy a warm home with no further worries about your furnace. Call us at 844-4GROGGS with any questions.

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