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

Your furnace keeps your house warm during the frigid winter months, so it’s frustrating when something is wrong. One routine issue is a furnace that endlessly turns on and switches off all the time. This problem is referred to as short cycling. It overworks your furnace and could cause expensive repairs or even premature replacement.

Short cycling can happen for a few reasons. Before you schedule furnace repair, consider the likely causes and how to take care of the situation.

1. Filthy Air Filter

The HVAC filter attracts airborne dust, hair and other pollutants that could wreak havoc on furnace. If you don’t change the filter often enough, it can become filthy and block the airflow. When this occurs, a safety mechanism turns off the furnace to prevent getting too hot. Pull Out the filter, and if it’s dirty, install a new one. From now on, change the filter every 30 to 90 days to prevent 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 look for shut or blocked air vents. For adequate system balance and performance, keep all registers open, even in unoccupied rooms.

3. Dirty Blower Wheel

The furnace blower consists of blades that move air through the ductwork. If they are dirty, the air won’t move right, leading to overheating and short cycling. Frequently putting in a new the filter is the easiest approach to avoid a dirty blower wheel. If the blades are already dirty, schedule furnace maintenance to have them cleaned.

4. Faulty Thermostat

Check your thermostat next. This is the cortex of your HVAC system and instructs the furnace on what to do. Make sure the thermostat is in 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 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 instructions.

5. Sooty Flame Sensor

The flame sensor turns off the gas valve when no burner flame on. The sensor can’t detect the flame if it’s coated in soot, so the gas shuts off sooner and the furnace turns off. Leave the adjustment of cleaning a sooty flame sensor to a pro like Service Experts Heating & Air Conditioning.

6. Oversized Furnace

When it comes to heating and cooling equipment, larger isn’t always better. An oversized system warms up your residence too quickly, leading to uncomfortable temperature swings and short cycling. The only way to fix this problem is to request new furnace installation.

If you go through the resolutions we covered here and nothing has changed, it’s time to call in the Experts at Service Experts Heating & Air Conditioning. We’ll examine the situation, pinpoint the cause, and perform the necessary work. Our aim is to bring back indoor comfort, energy efficiency and reliable furnace performance for the remainder of the season. And our repairs are upheld by a 100% Satisfaction Guarantee for a year.* For more info about furnace short cycling, or to book HVAC repair, call us at 318-588-8163 now!


*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