Skip navigation

Serving the Treasure Coast!


Speedy Air Conditioning Service Blog

The Threat of Short Cycling

Short cycling is a behavior in which your furnace turns itself on and off every few minutes without completing its heating cycle. While this may seem like a random quirk and not really a big deal, it is actually a huge threat to your system. If left unchecked, short cycling can permanently shorten the life of your heating system. Read on to find out more about where short cycling comes from, how it damages your system, and what you can do about it.

The Cause of Short Cycling

Short cycling is caused by heat becoming trapped inside the furnace, usually due to the air filter becoming clogged. As the temperature in the furnace rises, the limit switch activates and shuts down the system to protect it. This doesn’t solve the root problem, however. As soon as the furnace cools off enough to reactivate, it will overheat again and be shut down again. This cycle continues indefinitely.

The Damage Short Cycling Causes

Short cycling locks your furnace into its startup cycle, which is the most stressful part of its operation. Aside from preventing the furnace from heating your home properly, this places the system under a level of stress that it isn’t designed to handle. Prolonged short cycling makes it all but inevitable that your furnace will develop serious problems. Parts will start to break down, causing a rapid decline in efficiency that will eventually result in a complete system breakdown. If you want to preserve your furnace, you need to call for repairs as soon as you notice that it’s short cycling. If caught early enough, cleaning or replacing the air filter is typically enough to solve the problem.

If your furnace is in need of repair, call Speedy Air Conditioning Service. We cover the entire Palm City, FL area.

Comments are closed.