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

Your furnace keeps your you cozy during the harsh winter months, so it’s annoying when something is wrong. One routine complaint is a furnace that endlessly turns on and shuts back off again. This issue is referred to as short cycling. It strains equipment and might lead to costly repairs or even premature breakdowns.

Short cycling can be the result of for varying reasons. Before you schedule furnace repair, review the potential causes and how to resolve the issue.

1. Clogged Air Filter

The HVAC filter attracts airborne dust, hair and other debris that could wreak havoc on furnace. If you don’t change the filter regularly, it can become filthy and decrease the airflow. When this happens, a safety device shuts off the furnace to avoid overheating. Inspect the filter, and if it’s dirty, replace it. From here on out, replace the filter every 30 to 90 days to stop your furnace from short cycling.

2. Obstructed Air Vents

A dirty filter isn’t the only trouble that can lower airflow and overheat your furnace. Walk around your home and check for shut or blocked air vents. For recommended system balance and performance, keep all registers open, even in empty 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 travel right, creating overheating and short cycling. Frequently changing the filter is the simplest way to prevent 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 tells the furnace 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 direct 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. 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 sooty, so the gas shuts off sooner and the furnace shuts down. Leave the job of fixing a dirty flame sensor to a professional like Rolf Griffin Service Experts .

6. Oversized Furnace

When it includes HVAC equipment, larger isn’t always better. An oversized system warms up your house too rapidly, causing unpleasant temperature swings and short cycling. The only way to take care of this issue is to request new furnace installation.

If you attempt the fixes we covered here and you’re still having issues, it’s time to reach the Experts at Rolf Griffin Service Experts . We’ll review the situation, pinpoint the cause, and provide the necessary repair. Our goal is to bring back indoor comfort, energy efficiency and reliable furnace performance for the remainder of the season. And our work is backed by a 100% Satisfaction Guarantee for a year.* For more details about furnace short cycling, or to book HVAC repair, reach us at 260-557-1275 today!


*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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