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

Your furnace keeps your home comfortable during the harsh winter months, so it’s frustrating when something is wrong. One common complaint is a furnace that continuously turns on and shuts back off all the time. This issue is referred to as short cycling. It strains your furnace and might result in pricey repairs or even earlier than normal replacement. 

Short cycling can be caused by for several reasons. Before you request furnace repair, read about the possible causes and how to fix the issue. 

1. Clogged Air Filter 

The HVAC filter catches airborne dust, hair and other debris that could cause problems for furnace. If you don’t replace the filter regularly, it can get clogged and decrease the airflow. When this occurs, a safety mechanism shuts off the furnace to prevent overheating. Pull Out the filter, and if it’s dirty, install a new one. Going forward, get a new filter every 30 to 90 days to keep your furnace from short cycling. 

2. Obstructed Air Vents 

A dirty filter isn’t the only thing that can restrict airflow and overheat your furnace. Walk around your house and check for shut or obstructed air vents. For proper system balance and performance, keep all registers open, even in empty rooms. 

3. Dirty Blower Wheel 

The furnace blower has blades that move air through the ductwork. If they are dirty, the air won’t move correctly, causing overheating and short cycling. Regularly putting in a new the filter is the easiest approach to stop 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 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 shown on the screen. Try replacing the batteries. Also, check whether the thermostat is in bright sunlight or near a heat source that could impact the temperature reading. If you rely on a smart thermostat, check the manufacturer’s site for troubleshooting instructions. 

5. Sooty Flame Sensor 

The flame sensor turns off the gas valve when no burner flame is present. The sensor can’t sense the flame if it’s sooty, so the gas shuts off prematurely and the furnace shuts down. Leave the adjustment of fixing a dirty flame sensor to a pro like Stevenson Service Experts. 

6. Oversized Furnace 

When it involves HVAC equipment, larger isn’t always right. An oversized system heats up your residence too quickly, causing unpleasant temperature fluctuations and short cycling. The only way to take care of this problem is to do new furnace installation

If you attempt the solutions suggested here and you’re still having issues, it’s time to call in the professionals at Stevenson Service Experts. We’ll take a look at the situation, diagnose the cause, and perform the necessary repair. Our priority is to reintroduce indoor comfort, energy efficiency and trustworthy furnace performance for the rest of the season. And our work is upheld by a 100% Satisfaction Guarantee for a year.* For more info about furnace short cycling, or to schedule HVAC repair, give us a call at 614-334-3192 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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