(801) 396-2446 High-Efficiency Experts / Service & Installation

Basics and Causes of Short-Cycling

Heating the home is one of the most important functions of the HVAC system over the winter season, and the furnace is one of the primary devices used here. At Airtime Heating & Cooling, we’re here to help provide you with the comprehensive furnace service you need to keep your family warm throughout the year. One of the more common issues we see with malfunctioning furnaces is one called short-cycling. This is when the furnace starts and stops too quickly or too often – it’s generally associated with air conditioners, but it happens to furnaces in the same way. Here’s a look at three common possible causes of short-cycling in your furnace.

Oversized Furnace

In many cases, the problem that leads to short-cycling can be traced back to installation. A furnace that’s oversized or too big for the installation space will consume far too much energy while it tries to achieve your thermostat setting. This process causes warm air to be distributed improperly, and can cause short-cycling. This can drive up energy bills, and can also cause significant wear and tear on the furnace fan. If you aren’t sure whether this is the reason for your short-cycling, contact our experts for help.


In some other cases, the furnace might be shutting itself down early to protect from overheating damage. Furnaces that overheat create risks of cracks in the exchanger – these can lead to life-threatening risks from carbon monoxide. Overheating is generally caused by restricted airflow trapping hot air near the heat exchanger, often the result of a dirty air filter or blocked vents.

Thermostat Malfunctions

Finally, the thermostat itself might be the cause of short-cycling. A malfunctioning thermostat can lead to numerous heating issues, including short-cycling. In addition, a thermostat that’s improperly installed too close to a heat source can cause short-cycling – the thermostat thinks the temperature is higher than it actually is in this case. For more on short-cycling, or to find out about our furnace tune-up services, speak to the pros at Airtime Heating & Cooling today.


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High-Efficiency Experts / Service & Installation
(801) 396-2446 High-Efficiency Experts / Service & Installation