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

Your furnace keeps your home comfortable during the harsh winter months, so it’s annoying when something isn’t quite right. One frequent situation is a furnace that endlessly kicks on and shuts back off over and over. This operating error is referred to as short cycling. It stresses equipment and might result in expensive repairs or even early failure. 

Short cycling can be caused by for a few reasons. Before you request furnace repair, consider the likely causes and how to resolve the situation. 

1. Filthy Air Filter 

The HVAC filter attracts airborne dust, hair and other debris that could damage the furnace. If you don’t change the filter regularly, it can get dirty and block the airflow. When this happens, a safety mechanism shuts off the furnace to avoid getting too hot. Inspect the filter, and if it’s dirty, install a new one. From now on, replace the filter every 30 to 90 days to prevent your furnace from short cycling. 

2. Clogged Air Vents 

A dirty filter isn’t the only thing that can lower airflow and overheat your furnace. Walk around your home and look for shut or obstructed air vents. For adequate system balance and performance, keep all registers open, even in empty rooms. 

3. Dirty Blower Wheel 

The furnace blower consists of blades that distribute air through the ductwork. If they are covered in dirt, the air won’t move properly, causing overheating and short cycling. Frequently putting in a new the filter is the easiest approach to prevent a dirty blower wheel. If the blades are already dirty, schedule furnace maintenance to have them cleaned. 

4. Faulty Thermostat 

Check your thermostat next. This is the cortex of your HVAC system and gives the furnace instructions on what to do. Ensure the thermostat is on 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 bright sunlight or near a heat source that could influence the temperature reading. If you rely on a smart thermostat, check the manufacturer’s site for troubleshooting guides. 

5. Soot-Covered Flame Sensor 

The flame sensor switches off the gas valve when no burner flame is present. The sensor can’t detect the flame if it’s sooty, so the gas shuts off prematurely and the furnace shuts down. Leave the adjustment of cleaning a sooty flame sensor to an Expert like Stevenson Service Experts. 

6. Oversized Furnace 

When it involves HVAC equipment, oversized isn’t always best. An oversized system warms up your residence too quickly, creating unpleasant temperature swings and short cycling. The only way to resolve this issue is to request new furnace installation

If you try the resolutions suggested here and you’re still having issues, it’s time to contact the pros at Stevenson Service Experts. We’ll take a look at the situation, figure out the cause, and perform the necessary work. Our goal is to bring back indoor comfort, energy efficiency and reliable furnace performance for the remainder of the season. And our services are supported by a 100% Satisfaction Guarantee for a year.* For more details about furnace short cycling, or to book HVAC repair, reach us at 614-334-3192 right away! 

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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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