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

Your furnace keeps your house comfortable during the chilly winter months, so it’s frustrating when something isn’t quite right. One frequent issue is a furnace that continually switches on and shuts back off all the time. This operating error is known as short cycling. It overworks equipment and may cause costly repairs or even earlier than normal breakdowns.

Short cycling can happen for several reasons. Before you request furnace repair, consider the potential causes and how to resolve the problem.

1. Clogged Air Filter

The HVAC filter attracts airborne dust, hair and other substances that could wreak havoc on furnace. If you don’t replace the filter regularly, it can eventually be filthy and block the airflow. When this takes place, a safety mechanism turns off the furnace to avoid overheating. Check the filter, and if it’s dirty, get a new one. From here on out, get a new filter every 30 to 90 days to keep your furnace from short cycling.

2. Blocked Air Vents

A dirty filter isn’t the only thing that can lower airflow and overheat your furnace. Walk around your house and check for unopened 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 uses blades that move air through the ductwork. If they are dirty, the air won’t flow correctly, causing overheating and short cycling. Regularly replacing the filter is the simplest way to prevent a dirty blower wheel. If the blades are already dirty, schedule furnace maintenance to have them cleaned.

4. Faulty Thermostat

Inspect your thermostat next. This is the core of your HVAC system and instructs the furnace on what to do. Make sure the thermostat is on heating mode and auto fan with the desired temperature shown on the screen. Try replacing the batteries. Also, check whether the thermostat is in full sunlight or near a heat source that could affect the temperature reading. If you rely on a smart thermostat, visit 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 sense the flame if it’s sooty, so the gas turns off too soon and the furnace shuts off. Leave the adjustment of repairing a faulty flame sensor to a professional like Service Experts Heating & Air Conditioning.

6. Oversized Furnace

When it includes heating and cooling equipment, larger isn’t always best. A bigger system heats up your house too fast, causing uncomfortable temperature fluctuations and short cycling. The only way to take care of this situation is to request new furnace installation.

If you try the fixes we went over here to no avail, it’s time to contact the professionals at Service Experts Heating & Air Conditioning. We’ll review the situation, figure out the cause, and perform the necessary work. Our priority is to bring back indoor comfort, energy efficiency and dependable furnace performance for the remainder of the season. And our repairs are supported by a 100% Satisfaction Guarantee for a year.* For more information about furnace short cycling, or to schedule HVAC repair, give us a call at 330-235-1260 right away!


*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.