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

Your furnace keeps your family cozy during the frigid winter months, so it’s disconcerting when something is wrong. One frequent situation is a furnace that continuously switches on and switches off over and over. This problem is known as short cycling. It overworks your furnace and might result in costly repairs or even premature replacement. 

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

1. Dirty Air Filter 

The HVAC filter attracts airborne dust, hair and other debris that could cause problems for furnace. If you don’t get a new filter regularly, it can get dirty and block the airflow. When this takes place, a safety feature turns off the furnace to avoid overheating. Inspect the filter, and if it’s dirty, install a new one. From now on, install a new filter every 30 to 90 days to keep your furnace from short cycling. 

2. Clogged Air Vents 

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

3. Dirty Blower Wheel 

The furnace blower has blades that push air through the ductwork. If they are covered in dirt, the air won’t travel properly, leading to overheating and short cycling. Frequently replacing the filter is the simplest method to avoid a dirty blower wheel. If the blades are already dirty, request furnace maintenance to have them cleaned. 

4. Faulty Thermostat 

Examine your thermostat next. This is the brain of your HVAC system and instructs the furnace on what to do. Double-check the thermostat is on heating mode and auto fan with the desired temperature displayed on the screen. Try changing the batteries. Also, check whether the thermostat is in full sunlight or near a heat source that could impact the temperature reading. If you rely on a smart thermostat, go to the manufacturer’s site for troubleshooting instructions. 

5. Sooty Flame Sensor 

The flame sensor is responsible for turning off the gas valve when no burner flame on. The sensor can’t sense the flame if it’s coated in soot, so the gas shuts off sooner and the furnace shuts down. Leave the adjustment of repairing a sooty flame sensor to a professional like Stevenson Service Experts. 

6. Oversized Furnace 

When it involves heating and cooling equipment, oversized isn’t always better. A larger system adds warmth to your house too fast, creating unpleasant temperature swings and short cycling. The only way to resolve this problem is to schedule new furnace installation

If you attempt the fixes we mentioned here and you’re still having issues, it’s time to contact the professionals at Stevenson Service Experts. We’ll examine the situation, pinpoint the cause, and provide the necessary service. Our aim is to reintroduce indoor comfort, energy efficiency and reliable furnace performance for all season long. And our repairs are backed 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 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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