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

Your furnace keeps your family comfortable during the frigid winter months, so it’s disconcerting when something isn’t quite right. One frequent complaint is a furnace that endlessly turns on and switches off all the time. This issue is called short cycling. It stresses equipment and may lead to expensive repairs or even earlier than normal failure. 

Short cycling can be the result of for varying reasons. Before you request furnace repair, consider the likely causes and how to resolve the problem. 

1. Clogged Air Filter 

The HVAC filter traps airborne dust, hair and other debris that could wreak havoc on furnace. If you don’t change the filter regularly, it can become dirty and block the airflow. When this occurs, a safety feature turns off the furnace to prevent getting too warm. Pull Out the filter, and if it’s dirty, get a new one. From here on out, install 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 trouble that can reduce airflow and overheat your furnace. Walk around your house and check for closed or crowded air vents. For adequate system balance and performance, keep all registers open, even in empty rooms. 

3. Dirty Blower Wheel 

The furnace blower consists of blades that push air through the ductwork. If they are caked with dirt, the air won’t move properly, creating overheating and short cycling. Frequently changing the filter is the easiest method to stop 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 cortex of your HVAC system and tells the furnace what to do. Double-check the thermostat is set to heating mode and auto fan with the desired temperature showing on the screen. Try changing the batteries. Also, check whether the thermostat is in direct sunlight or near a heat source that could influence the temperature reading. If you use a smart thermostat, visit the manufacturer’s site for troubleshooting instructions. 

5. Dirty Flame Sensor 

The flame sensor is responsible for turning off the gas valve when no burner flame on. The sensor can’t sense 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 Service Experts Heating & Air Conditioning. 

6. Oversized Furnace 

When it comes to heating and cooling equipment, larger isn’t always right. A larger system heats up your residence too rapidly, leading to unpleasant temperature swings and short cycling. The only way to resolve this problem is to schedule new furnace installation. 

If you go through the resolutions suggested here to no avail, it’s time to contact the professionals at Service Experts Heating & Air Conditioning. We’ll take a look at the situation, diagnose the cause, and do the necessary service. Our priority is to restore indoor comfort, energy efficiency and dependable furnace performance for the remainder of the season. And our repairs are upheld by a 100% Satisfaction Guarantee for a year.* For more details about furnace short cycling, or to book HVAC repair, give us a call at 954-736-4314 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.