Why is it that my heater won’t turn off

March 8, 2023

Have you found yourself pacing back and forth, wondering “Why is it that my heater won’t turn off?” You’re not alone. Many homeowners face this issue, and it can be a result of several different causes. In this article, we’ll discuss the common reasons why your furnace won’t turn off and what you can do to fix the problem. Keep reading to learn more.

The Thermostat Is Set Too High

One of the most common reasons why your furnace won’t turn off is that the thermostat is set too high. This can be a simple fix and is often overlooked. If the thermostat is set too high, the furnace will remain on and never shut off. This means the furnace will continue to work, burning more energy and costing you more money. The first step to determining if the thermostat is set too high is to check the temperature setting. Most thermostats have a range of 60-80 degrees Fahrenheit. If the thermostat is set above 80 degrees, this is likely the cause of the issue. If the thermostat is set too low, the furnace will not turn on at all.

The Limit Switch Is Malfunctioning

When the furnace in your home won’t turn off, it can be very frustrating. After all, the last thing you want is for your home to become too hot. One of the possible reasons for your furnace not turning off is a malfunctioning limit switch. A limit switch is a safety device that monitors the temperature of the furnace. It is designed to shut off the furnace when the temperature reaches a certain level. It is basically a safeguard that prevents the furnace from overheating and potentially causing a house fire. When the limit switch malfunctions, it can cause the furnace to not turn off. This is because the switch is not able to properly detect when the furnace has reached its temperature limit, so it will continue to run.

The Pilot Light Is Out

If you’ve recently noticed that your furnace won’t turn off and you’re wondering why, there’s a chance that your pilot light is out. Your pilot light is an important part of your furnace and it serves two primary functions. The first is to provide a spark that ignites the gas burner, allowing the furnace to produce heat. The second is to keep the gas supply to the furnace open, allowing it to continue to produce heat.

Without the pilot light, your furnace won’t be able to produce heat and it won’t be able to turn off. This means that if the pilot light is out, your furnace will keep running, even when you don’t want it to. This can be a major problem as it can cause your energy bills to rise considerably. It can also be dangerous, as the furnace can overheat and potentially cause a fire.

The Furnace Is Too Old

Furnaces have a general lifespan of around 15-20 years, depending on the make and model, and how well it’s been maintained. If your furnace is older than that, it could be time to replace it. A furnace that’s too old will be inefficient in using energy to heat your home, and this could be the cause of your furnace not turning off. An old furnace is less likely to respond to the thermostat’s commands and will stay on longer than necessary. This can cause it to overheat, leading to safety concerns and increased energy bills.

Overall, it is important to identify why your furnace will not turn off in order to ensure its safe and efficient operation. Regular maintenance, a properly set thermostat, and checking the unit’s controls are all essential steps to take in order to diagnose the issue and address the problem before it becomes more serious.

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Andi Perullo de Ledesma

I am Andi Perullo de Ledesma, a Chinese Medicine Doctor and Travel Photojournalist in Charlotte, NC. I am also wife to Lucas and mother to Joaquín. Follow us as we explore life and the world one beautiful adventure at a time.

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Thanks for sharing, it means the world to me!

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