6 Reasons Why Your Furnace Keeps Switching Off and How to Repair It 

Your furnace keeps your house warm during the frigid winter months, so it’s disconcerting when something is off. One frequent issue is a furnace that endlessly turns on and turns off over and over. This issue is referred to as short cycling. It stresses your heating system and might cause costly repairs or even early replacement. 

Short cycling can be the result of for a few reasons. Before you book furnace repair, research the possible causes and how to resolve the problem. 

1. Dirty Air Filter 

The HVAC filter catches airborne dust, hair and other substances that could wreak havoc on furnace. If you don’t replace the filter frequently, it can become dirty and decrease the airflow. When this happens, a safety feature shuts off the furnace to prevent getting too hot. Pull Out the filter, and if it’s dirty, replace it. Going forward, replace the filter every 30 to 90 days to keep your furnace from short cycling. 

2. Obstructed Air Vents 

A dirty filter isn’t the only issue that can lower airflow and overheat your furnace. Walk around your home and look for closed or blocked air vents. For recommended system balance and performance, keep all registers open, even in unoccupied rooms. 

3. Dirty Blower Wheel 

The furnace blower has blades that distribute air through the ductwork. If they are dirty, the air won’t move correctly, leading to overheating and short cycling. Frequently putting in a new the filter is the simplest method to avoid a dirty blower wheel. If the blades are already dirty, book furnace maintenance to have them cleaned. 

4. Faulty Thermostat 

Check 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 in heating mode and auto fan with the desired temperature showing on the screen. Try changing the batteries. Also, check whether the thermostat is in full sunlight or near a heat source that could affect the temperature reading. If you have a smart thermostat, go to the manufacturer’s site for troubleshooting tips. 

5. Soot-Covered Flame Sensor 

The flame sensor turns off the gas valve when no burner flame going. The sensor can’t detect the flame if it’s coated in soot, so the gas shuts off sooner and the furnace shuts off. Leave the work of fixing a dirty flame sensor to a pro like Roland J. Down Service Experts. 

6. Oversized Furnace 

When it involves heating and cooling equipment, larger isn’t always best. An oversized system warms up your residence too fast, leading to intolerable temperature swings and short cycling. The only way to resolve this problem is to request new furnace installation

If you try the resolutions we mentioned here and nothing has changed, it’s time to contact the pros at Roland J. Down Service Experts. We’ll examine the situation, figure out the cause, and provide the necessary work. Our goal is to bring back indoor comfort, energy efficiency and dependable furnace performance for all season long. 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 518-417-2938 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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