Gas Furnace Burner Cycles On And Off

One of the most common issues in early winter are gas furnaces that wont stay running.

Gas furnace burner cycles on and off. Fixing a short cycling furnace requires working with electrical and gas systems which can result in serious injury to yourself your furnace and your home if handled incorrectly. A professional hvac technician will identify your problem and offer the appropriate solution. A hvac professional was out and initially thought there may be a duc. During a cold snap the furnace won t heat the house to desired temps.

1 low airflow. There are several indirect issues that cause low. If the gas regulator delivers gas at a pressure higher than antcipated by the furnace design engineers the burner puts out too much heat the plenum overheats during the. The burner will run for 5 minutes and shut off for about 2 minutes and then turn back on for 5 minutes while the fan runs continuously.

In most cases it s best to hire a pro to examine your furnace. Short cycling or high limit rocking in a gas fueled furnace may be due to excessive gas pressure in turn caused by improper gas pressure regulation. When your furnace is cycling on and off it s called furnace short cycling. When your furnace isn t actually heating though your furnace blower shouldn t be running at all.

You may have a gas furnace thats several years old yourself. First it is important to realize that a furnace which is short cycling as we call it in the business probably means that its safety features are working properly so breathe a sigh of relief. In normal operation your furnace blower fan should come on 1 5 to 3 minutes after your thermostat calls for heat and should turn off several minutes after the heating cycle ends. Or even a furnace replacement if it s left for too long.

If your furnace keeps shutting off it could be due to low airflow. When your gas furnace s heat exchanger the part that heats your home s air overheats your furnace will shut down to protect it from further damage after the heat exchanger cools off it ll turn back on and continue in an endless cycle of overheating and then shutting off. Below we go over some of the more common causes why this might be happening. 3 reasons your gas furnace is short cycling 1.

They repeatedly cycle on and off only heating for 2 5 minutes. This is commonly referred to as short cycling.