heating and AC, plumbing & electric
Thank you for considering Paschal Air, Plumbing & Electric as your service provider. We are proud to serve Arkansas & Missouri for more than 50+ years. You can rest easy because whatever your air, plumbing or electrical needs may be – there’s nothing we can’t handle. It’s our passion and it’s our promise to you, one that we proudly stand behind. Avoid the hassle – go with Paschal!


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heating and AC, plumbing & electric 479.900.0784
January 20, 2023

What to do When Your Heater Won't Turn Off

As homeowners, it’s not uncommon for our heating systems to have a problem every now and then. It could be as straightforward as a bad thermostat or an electrical problem. If your gas furnace won’t shut off, don’t panic. Our have compiled a list of steps you can take to get your heating system back in working order.

Examine the Air Filter

A dirty air filter is one of the most common problems that homeowners face with their HVAC systems. When the filter becomes clogged with dust and debris, it restricts airflow, making your furnace work harder and run longer to satisfy your ideal temperature. This increase in usage on your furnace can lead to a breakdown and early failure. It can also cause your furnace to overheat and shut off for a time to cool down. This is known as short cycling, which can not only wear out your furnace faster but can also drive up your heating bill and make your home feel uncomfortable.

To prevent this issue, we recommend replacing flat filters once a month and pleated filters every three months. If you can’t remember the last time you got a new furnace filter, remove it and hold it up to the light. If you can’t see light through your filter, it’s too dusty and you should replace it. If the problem is linked to a clogged air filter, putting in a fresh filter should fix the problem when your heat won’t turn off.

change air filter

Check Out the Thermostat

Your thermostat is the brain of your heating system and it tells the unit when to turn on and off. It’s usually the problem when your furnace won’t stop running. Sometimes, having the heat turn off is as easy as changing a wrong thermostat setting.

Ensure Your Thermostat is Set to “Auto”: Your thermostat includes two settings, “auto” and “on,” that control your heating system’s blower motor. “Auto” indicates the furnace blower will only operate when the furnace does. “On” indicates the furnace blower will operate continuously. This constant air flow can help with heat distribution but will also increase your power bill and increase wear and tear on your furnace.

If your thermostat is switched to “on,” it will sound like your furnace is not shutting off, but it’s really just the furnace blower you’re noticing. Changing it to “auto” should resolve the problem. It will also help you save money on your energy costs.

Check Your Temperature Setting

If your thermostat won’t turn off heat, check the temperature setting to the room temperature. If it’s higher than the room air temp, your furnace will keep operating until it reaches your desired temp. Remember that if it’s extremely cold outside, your furnace will have to operate much longer than usual to keep your home cozy. This is because of a large temperature difference between the cold air outside and the warm indoors. As a test, you can try reducing the thermostat to match the room. Then, wait a couple of minutes. This should make the furnace turn off in a few minutes.

heating and AC, plumbing & electric

Put in Fresh Batteries

If you have a programmable thermostat, it’s likely battery-powered. You can test replacing the batteries to see if that solves the problem. If it doesn’t or if there’s wiring to your electrical system, switch it to “off.”

Turn Off the Power

Thermostat appears to be working fine but your furnace still won’t turn off? There are two places you can shut off the power to your heating unit: at the breaker box and at its dedicated power switch.

Go to your breaker box and locate the breaker marked “furnace.” Move the breaker switch to the right to shut off power. Next, look for the specific power switch to your heating system. It’s similar to a light switch and is located on or close to your furnace. Move the switch down to shut off power. Your furnace should be shut off now.

Professional Service

At Paschal Air, Plumbing & Electric, we understand the importance of a properly working heating system during the colder months. That’s why we offer prompt and reliable service to homeowners in need. Our team of experts are equipped with the knowledge and tools to diagnose and fix any issues with your heating system. A malfunctioning heating system can be a frustrating and potentially costly problem. However, by following the steps outlined in this guide and contacting the experts at Paschal Air, Plumbing & Electric, you can troubleshoot the issue and get your heating system back in working order. Trust in our team of experts to provide prompt and reliable service to get your home warm and comfortable again. Click here to schedule your next appointment online.