Gas Furnace Burners Light Then Go Out

Boiler systems are another common central heating system that operates in the same basic way so the issues and solutions are pretty much the same.

Gas furnace burners light then go out.

Broken or cracked ceramic are signs that the flame sensor is defective. The thermocouple is the copper rod the pilot flame directly hits. If the thermocouple fails to shut off the gas all the gas flowing through the furnace could get into your home. The second time it will light maybe 3 burners for a few seconds then go out then the blower will come on i replaced the flame sensor but no help.

My problem is that the pilot lights stays on and the burners light. If the pilot is going out it could be a deffective combination. If not the pilot could be pulling off the sensor when main burners light. A dirty or malfunctioning sensor.

Everything starts over again without ignition of your gas burners. Insufficient gas pressure. But after a matter of seconds the burners go out. My furnace will light one burner the first time for a few seconds then go out.

Flame sensors rarely fail. The furnace acts up in 2 ways. This article will detail how a. Then the process repeats and eventually the burners stay lit and the blower comes on.

This could be a dirty pilot or a gas pressure problem. Sometimes it s referred to as the flame sensor it s a safety mechanism that shuts the gas off should the pilot go out. The most common causes for a furnace flame going out include. Because of this coating electricity flow is restricted and the furnace control system thinks the burner has failed to light and shuts off the gas as a safety measure even though everything has worked as designed.

Your furnace s thermocouple is a copper rod that sits next to your furnace burners it s often called the flame sensor because its job is to detect whether the pilot light is lit or not if it can t sense a flame from the pilot light it prevents the gas valve from opening and sending more gas into the combustion chamber. Check all wires and ground wires to make sure they have good tight connections and are not burnt.