6 Reasons Why Your Furnace Keeps Turning Off and How to Resolve It 

Your furnace keeps your house comfortable during the frigid winter months, so it’s disconcerting when something is off. One routine complaint is a furnace that continually turns on and turns off over and over. This operating error is known as short cycling. It stresses equipment and might result in costly repairs or even early failure. 

Short cycling can be the result of for varying reasons. Before you request furnace repair, research the possible causes and how to resolve the issue. 

1. Dirty Air Filter 

The HVAC filter attracts airborne dust, hair and other substances that could wreak havoc on furnace. If you don’t get a new filter regularly, it can become dirty and decrease the airflow. When this takes place, a safety mechanism switches off the furnace to avoid overheating. Inspect 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 reduce airflow and overheat your furnace. Walk around your house and look for shut or crowded 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 caked with dirt, the air won’t move correctly, causing overheating and short cycling. Regularly 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 

Check your thermostat next. This is the brain of your HVAC system and instructs the furnace on what to do. Ensure the thermostat is set to heating mode and auto fan with the desired temperature showing on the screen. Try replacing the batteries. Also, check whether the thermostat is in bright sunlight or near a heat source that could affect the temperature reading. If you rely on a smart thermostat, go to the manufacturer’s site for troubleshooting tips. 

5. Dirty 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 switches off sooner and the furnace shuts off. Leave the work of repairing a dirty flame sensor to an Expert like Atmostemp Service Experts. 

6. Oversized Furnace 

When it involves heating and cooling equipment, larger isn’t always better. A larger system adds warmth to your residence too fast, causing unpleasant temperature fluctuations and short cycling. The only way to resolve this issue is to request new furnace installation

If you try the resolutions we mentioned here and nothing has changed, it’s time to contact the professionals at Atmostemp Service Experts. We’ll review the situation, pinpoint the cause, and provide the necessary repair. Our aim 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 request HVAC repair, reach us at 856-310-4824 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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