Your furnace is short cycling if it’s turning on and off frequently without fully heating your home. Your heating system should only cycle about three to four times per hour. Here are a few of the most common reasons behind furnace short cycling in Tucson, AZ.

Clogged Air Filters

A dirty filter stops air from getting into your HVAC system. Without healthy airflow, the heat exchanger can begin to overheat, causing a system shutdown. Once the furnace cools down, it will start up again and repeat the cycle.

If you notice your furnace short cycling, immediately check to see if you have a clogged filter. Plan to change or wash your air filters every month.

Leaky Ductwork or Windows

Poorly insulated rooms, outdated ductwork and leaking windows can all cause furnace short cycling. These issues allow heat to escape outside or into uninsulated areas. The more heat escapes, the more frequently your furnace will kick on to reach your desired temperature.

Check your home thoroughly for drafts and hot and cold spots. Sealing up your windows with caulk and having your ductwork professionally examined can lower your chances of short cycling.

Dirty Flame Sensor

Your heating system’s flame sensor lets your furnace know there’s a flame so it can open the gas valve. If this sensor becomes dirty, it won’t be able to detect the pilot light and will shut the system down. Signing up for a maintenance plan will ensure your flame sensor stays clean and efficient.

Faulty Thermostat

An old or malfunctioning thermostat may tell your furnace to turn off prematurely. This can be due to issues with the wiring or the temperature sensor. If turning it off and replacing the batteries doesn’t correct the issue, consider replacing your thermostat.

Furnaces often short cycle due to clogged filters, thermostat issues and leaky ductwork and windows. Call MVP Heating & Air Conditioning for trustworthy heating repair in Tucson, AZ.

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