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 is wrong. One frequent situation is a furnace that continuously turns on and turns off over and over. This operating error is called short cycling. It strains your heating system and may lead to pricey repairs or even early failure.

Short cycling can be caused by for several reasons. Before you book furnace repair, read about the likely causes and how to fix the situation.

1. Filthy Air Filter

The HVAC filter traps airborne dust, hair and other pollutants that could cause problems for furnace. If you don’t replace the filter regularly, it can eventually be clogged and reduce the airflow. When this happens, a safety feature switches off the furnace to prevent getting too warm. Pull Out the filter, and if it’s dirty, get a new one. From now on, get a new 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 residence and be on the lookout for 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 move air through the ductwork. If they are caked with dirt, the air won’t flow correctly, causing overheating and short cycling. Routinely putting in a new the filter is the simplest way 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 brain of your HVAC system and instructs the furnace on what to do. Double-check the thermostat is in heating mode and auto fan with the desired temperature shown on the screen. Try changing the batteries. Also, check whether the thermostat is in bright sunlight or near a heat source that could influence the temperature reading. If you have a smart thermostat, go to the manufacturer’s site for troubleshooting guides.

5. Sooty Flame Sensor

The flame sensor is responsible for turning off the gas valve when no burner flame going. The sensor can’t sense the flame if it’s sooty, so the gas shuts off sooner and the furnace turns off. Leave the adjustment of repairing a faulty flame sensor to a professional like Service Experts Heating & Air Conditioning.

6. Oversized Furnace

When it comes to HVAC equipment, bigger isn’t always best. An oversized system adds warmth to your home too rapidly, leading to intolerable temperature changes and short cycling. The only way to take care of this issue is to schedule new furnace installation.

If you attempt the solutions we went over here and you’re still having problems, it’s time to contact the Experts at Service Experts Heating & Air Conditioning. We’ll take a look at the situation, diagnose the cause, and provide the necessary work. Our goal is to restore indoor comfort, energy efficiency and trustworthy furnace performance for the rest of the season. And our work is supported by a 100% Satisfaction Guarantee for a year.* For more info about furnace short cycling, or to book HVAC repair, call us at 352-414-4006 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.

chat now widget box