This event occurs when unburned oil accumulates and ignites in the combustion chamber, forcing oily particles through vents and registers. Blinking with no other symptoms often traces to wiring rather than a furnace component failure. Jan 7, 2019 · Upon starting the heating appliance, this oil can ignite and cause an explosion or misfire inside the furnace. So check them if your gas furnace fails to ignite when you turn the system on. We share how to fix backfiring. It may not always be obvious whether the damaged HVAC system cause of loss was wear and tear or another peril, such as smoke and fire. Dec 15, 2015 · A puff back is capable of sending soot, ashy residue, and noxious odors throughout your property via the furnace/boiler exhaust system and heating ducts. Dec 25, 2025 · An oil furnace puff back is an abrupt backfire of partially burned fuel and soot into a home when an oil burner fails to ignite properly. How Do Puff Backs Happen? A puff back occurs when a furnace or boiler does not ignite properly and allows the oil or natural gas vapors to build up within the combustion chamber of the furnace. With over five decades in the restoration industry, we’re one of the longest standing restoration companies in New York.

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