Why does this gas furnace backfire

Gas furnaces backfiring generally occurs when the gas furnace misses ignition.

A small explosion occurs when fumes start to build up because the ignitor delays lighting up.

When the control unit signals for heat from the central gas furnace, it prompts a gas valve to open, sending gas to the burners. Modern gas gas furnaces are ignited by an ignition switch, while traditional pilot lights ignite the older systems. The burner flames from the combustion after ignition heats up the Heating plus Air Conditioning unit’s heat exchanger. The Heating plus Air Conditioning equipment’s air blower pushes the heat produced in the combustion process throughout your home. So when there is an ignition switch or sensor delay due to a weak or dirty pilot light, your gas gas furnace backfires and causes a small explosion. When too much primary air mixes with gas, the gas furnace will not light hastily, causing gas build-up. Likewise, too little gas at the burners makes it difficult for the gas-air mixture to light up. Call an Heating plus Air Conditioning business to repair the problem. When debris builds up in the gas furnace, it leads to an explosion of the oil atoms. These explosions are a result of faulty valves, a dirty filter, or a bad oil burner. It is vital to keep the area around the gas furnace clear of clutter plus debris. Do not locale any gasoline or paint thinners in the same room as the gas furnace. These could cause an explosion. It would help if you upgraded your Heating plus Air Conditioning air filters correctly to prevent having gas furnace backfires. Check your Heating plus Air Conditioning component for any expanding air ducts which could cause loud bang noises. Typically, expanding air ductwork makes noise due to a lot of static pressure in the air duct. Too much static pressure pushing on your air ductwork will cause it to expand plus cause a banging noise. Static pressure is brought about by undersized air ducts, closed supply vents, plus dirty air filters. Regular service will help eliminate cases of central gas furnace backfires.

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