The metal can expand when heated and will contract as it cools down after the furnace cycles off. The ducts that send warm air throughout your home are made of thin metal.
Problems with the ignition system in a furnace should be looked at by a trained technician, and the sooner, the better in most cases.Īnother reason your furnace might make banging noises is due to contraction and expansion of the ductwork. Additionally, the burners might be dirty or clogged, or the gas pressure might be low enough that ignition does not take place until there is a significant amount of it built up in the chamber. Furnaces that have electronic ignition might have an issue with the ignition system. If there is a pilot light, a weak flame might prevent the gas from igniting quickly. Several things can affect the ignition of gas in a furnace. The sound can travel throughout the house by way of the ducts. When ignition does take place, there is often enough gas built up in the chamber to create a banging noise. The ignition system or pilot light should ignite the gas right away.īut when there is a problem with the ignition system, a small amount of gas can build up in the combustion chamber. When a furnace gets the signal from the thermostat to begin a cycle, the gas valve opens. If you hear a loud bang from the furnace when it kicks on, it could be because of an issue with ignition.
0 kommentar(er)
