6 Reasons Why Your Furnace Keeps Turning Off and How to Take Care of It 

Your furnace keeps your family comfortable during the frigid winter months, so it’s frustrating when something isn’t quite right. One common situation is a furnace that continuously kicks on and switches off over and over. This operating error is known as short cycling. It stresses your furnace and may cause expensive repairs or even early replacement. 

Short cycling can happen for several reasons. Before you book furnace repair, research the potential causes and how to take care of the situation. 

1. Filthy Air Filter 

The HVAC filter traps airborne dust, hair and other substances that could wreak havoc on furnace. If you don’t change the filter often enough, it can eventually be clogged and decrease the airflow. When this occurs, a safety mechanism turns off the furnace to prevent overheating. Inspect the filter, and if it’s dirty, replace it. From here on out, replace the filter every 30 to 90 days to keep your furnace from short cycling. 

2. Clogged Air Vents 

A dirty filter isn’t the only issue that can restrict airflow and overheat your furnace. Walk around your house and check for shut or crowded air vents. For adequate system balance and performance, keep all registers open, even in unoccupied rooms. 

3. Dirty Blower Wheel 

The furnace blower consists of blades that distribute air through the ductwork. If they are dirty, the air won’t travel correctly, causing overheating and short cycling. Regularly replacing the filter is the simplest approach to stop a dirty blower wheel. If the blades are already dirty, request furnace maintenance to have them cleaned. 

4. Faulty Thermostat 

Inspect your thermostat next. This is the core of your HVAC system and gives the furnace instructions on what to do. Double-check the thermostat is set to heating mode and auto fan with the desired temperature showing on the screen. Try putting in new batteries. Also, check whether the thermostat is in full sunlight or near a heat source that could affect the temperature reading. If you use a smart thermostat, go to the manufacturer’s site for troubleshooting guides. 

5. Sooty Flame Sensor 

The flame sensor turns off the gas valve when no burner flame on. The sensor can’t find the flame if it’s sooty, so the gas switches off sooner and the furnace shuts off. Leave the job of cleaning a faulty flame sensor to an Expert like Norrell Service Experts. 

6. Oversized Furnace 

When it involves HVAC equipment, oversized isn’t always best. A larger system heats up your home too fast, causing uncomfortable temperature changes and short cycling. The only way to fix this situation is to schedule new furnace installation

If you go through the resolutions we went over here to no avail, it’s time to reach the professionals at Norrell Service Experts. We’ll take a look at the situation, pinpoint the cause, and do the necessary work. Our priority is to restore indoor comfort, energy efficiency and dependable furnace performance for the remainder of the season. And our services are upheld by a 100% Satisfaction Guarantee for a year.* For more info about furnace short cycling, or to request HVAC repair, reach us at 205-267-0023 now! 

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*Not applicable to the Advantage Program. See your signed Advantage Program Agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions. 

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