How long should furnace blower run after burner shuts off?

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. Your blower should run constantly until the heating cycle ends.

Why does my Goodman furnace shut off after a few seconds?

Hello, my goodman furnace ignites and shuts off after a few seconds. I researched it and thought it was the flame sensor. I replaced the flame sensor but it still does the same thing Experience: Experienced in all aspects of HVAC, both residential and commercial. Thanks for giving me the opportunity to help!

What happens when the main burner on a furnace ignites?

Problem: Your furnace main burner ignites, the main burner stays on for 8 to 10 seconds, then shuts right back off. Your furnace tries this ignition sequence again, and the same thing happens.

What happens when you turn on the furnace and the fan goes out?

The burner ignites but then goes out before heating up your home Situation: You turn the thermostat up, the furnace ignites and the burner comes on. The furnace stays on for awhile (maybe 1 minute, maybe 10 minutes) and then goes out. The fan continues to run even though the flames and pilot light go out.

Where does the gas go in a direct ignition furnace?

The gas valve sends gas to the main burner(s), which is lit by the pilot light. If you have a direct ignition furnace, you won’t have a pilot light. These furnaces skip steps 3-5 and instead light the burner directly. Your furnace will still have a flame sensor, but it will be over the burner’s flame.

Problem: Your furnace main burner ignites, the main burner stays on for 8 to 10 seconds, then shuts right back off. Your furnace tries this ignition sequence again, and the same thing happens.

What to do if your furnace shuts down before blower starts?

If the main burner ignites, but the furnace shuts down before the blower starts. You’ll want to check the main flame (or rollout, high limit, etc) sensor (s). If your furnace has error code indicators, check those and compare to the owners manual for translation.