--- title: "A Grease Fire Under the Range Hood: Lid On, Burner Off, Never Water" description: "How oil warns before it catches, the NFPA and USFA order of steps, the moment to get out and call 911, and what to look for in the filters and canopy…" url: "https://rangehooderepair.center/guides/a-grease-fire-under-the-hood/" date_modified: "2026-09-26" --- Grease, fire and air # A Grease Fire Under the Range Hood: Lid On, Burner Off, Never Water For a grease fire under a range hood, NFPA and USFA give the same order: cover the pan with a lid or a flat baking sheet, switch that burner off, leave the cover on until the pan is cold, and never throw water. If the flames do not go out or reach the hood or cabinets, get everyone out, close the door and call 911 from outside. By [RangeHoodeRepair.center technical team](https://rangehooderepair.center/authors/technical-team/) Published September 26, 2026 ## At a glance. Oil that smokes, then flares, a few inches below a stainless canopy: a grease fire under a range hood is over in seconds or out of control in a minute, and which way it goes depends on a lid, a burner knob and whether anyone reaches for water. Read the whole guide ### First move Lid over the pan, burner off NFPA says to slide the lid on and turn off the burner; USFA adds that a baking sheet works too. ### Water Never NFPA's tip is plain: never throw water on the fire. ### If it keeps burning Out of the house, then 911 NFPA says to get everyone out and call the fire department from outside. ### Afterwards Hood off until it is inspected Heat and soot reach the filters, the blower and the first length of duct. In this guide 1. How a pan of oil becomes a fire under the hood 2. The first seconds: lid on, burner off 3. When to stop fighting it and leave 4. What the hood looks like afterwards 5. Keeping the next one small 6. Step by step 7. Questions ## How a pan of oil becomes a fire under the hood Cooking oil gives a warning before it ignites. It shimmers, then thin smoke lifts off the surface, then the smoke thickens and turns gray. USFA's advice is to turn the burner off the moment there is any smoke or the grease starts to boil, because the next stage is flame. Once it catches, the flame climbs straight up toward the canopy. That is the part owners fear most, and it is why the first minute matters: a pan fire that is covered quickly stays a pan fire, while one that is fanned, moved or splashed can spread to the hood filters and the cabinets beside it. ### The pan nobody was watching NFPA puts unattended equipment behind a quarter of reported home cooking fires and half of the deaths from them. Frying is the task where that matters most, and both NFPA and USFA say to stay in the kitchen while oil is on the heat and to turn the burner off before leaving the room, even briefly. Source: [U.S. Fire Administration — Cooking Fire Safety](https://www.usfa.fema.gov/prevention/home-fires/prevent-fires/cooking/) — Turn the burner off if you see smoke or the grease starts to boil; keep a pan lid or baking sheet nearby to cover a pan that catches fire; if you leave the kitchen, turn the burner off ## The first seconds: lid on, burner off NFPA's instruction is to slide the lid over the pan and turn off the burner, then leave the cover in place, because lifting it early can let the fire start again. A baking sheet does the same job if no lid fits; USFA names it directly. Sliding the cover in from the side keeps your hand and arm out of the column of flame rising from the pan. Leave the pan exactly where it is. Carrying a burning pan toward the sink or the back door spills oil, and burning oil on the floor or the counter is a far larger fire than the one in the pan. - Cover the pan with a close-fitting lid; a baking sheet will do. - Turn the burner off. - Leave the cover on and let the pan cool for a long time. - Keep everyone else out of the kitchen while you do it. ### Why water is never the answer NFPA says never to throw water on a grease fire, and the installation manuals that come with range hoods repeat it, adding wet towels to the list. Water sinks under hot oil, turns to steam at once and throws burning oil up and out of the pan, onto the person holding the glass and into the hood above. ### Where the hood fits in Neither NFPA nor USFA gives the range hood a role in putting out a pan fire; every step they list is about the burner, the cover and getting out. Leave the hood controls alone and put your attention on the pan and on the people in the room. Source: [NFPA — Cooking safety](https://www.nfpa.org/education-and-research/home-fire-safety/cooking) — Unattended equipment is a factor in a quarter of home cooking fires and half the deaths; slide the lid over the pan and turn off the burner, do not remove the cover, never throw water; if the fire does not go out, get everyone out and call the fire department from outside; close the door behind you; have a clear way out; [U.S. Fire Administration — Cooking Fire Safety](https://www.usfa.fema.gov/prevention/home-fires/prevent-fires/cooking/) — Turn the burner off if you see smoke or the grease starts to boil; keep a pan lid or baking sheet nearby to cover a pan that catches fire; if you leave the kitchen, turn the burner off Close on a lid set over a small pan under a range hood, the burner off, a thin trail of smoke. ## When to stop fighting it and leave NFPA draws the line clearly: if the fire does not go out, or you do not feel comfortable sliding a lid over the pan, get everyone out of the home and call the fire department from outside. Close the kitchen door behind you if there is one; NFPA notes that a closed door helps contain the fire. Flames that reach the filters in the hood, lick around the edge of the canopy or catch the cabinet next to it mean the fire is no longer in the pan. That is the moment to go, and to call 911 from the street or a neighbor's porch rather than from the kitchen. ### A clear way out comes first NFPA adds one condition to any attempt at all: make sure others are already leaving and that you have a clear way out behind you. An island hood over a cooking surface in the middle of the room usually gives two exits; a wall hood at the end of a galley kitchen may give only one, and it should be behind you, not past the fire. Source: [NFPA — Cooking safety](https://www.nfpa.org/education-and-research/home-fire-safety/cooking) — Unattended equipment is a factor in a quarter of home cooking fires and half the deaths; slide the lid over the pan and turn off the burner, do not remove the cover, never throw water; if the fire does not go out, get everyone out and call the fire department from outside; close the door behind you; have a clear way out ## What the hood looks like afterwards Once the pan is cold and the room has aired, look up before cooking again. Soot on the underside of the canopy, discolored or warped mesh filters, a melted light lens or a smell of hot wiring all show how far the heat traveled. The parts you cannot see matter as much. Flame drawn through the filters can scorch the blower wheel and the wiring around the motor, and grease already lining the duct can smolder. Broan's manuals call for metal ductwork precisely so that a fire drawn in stays inside metal. ### Signs the hood stays switched off - Filters that are bent, blackened or stuck to the hood. - A light cover that has melted, cracked or clouded. - Soot or scorching on the chimney cover or the cabinet above an under-cabinet hood. - A burning or hot electrical smell that lingers after the food smell is gone. - A breaker that tripped during the fire, or a fan that now hums without spinning. Source: [Broan — BXT1 Series Range Hood Installation Instructions](https://broan-nutone.com/getmedia/e05acdba-b6be-4e9e-8182-e44db1a97192/Installation-Guide-BXT1.pdf?ext=.pdf) — Do not use water, including wet dishcloths or towels; use only metal ductwork so a grease fire is contained inside it; do not let grease accumulate on the fan, filters or ducts; heat oils slowly on low or medium ## Keeping the next one small Grease that builds up on filters and inside the canopy is fuel waiting above the burners. Broan's safety instructions say grease should not be allowed to collect on the fan, the filters or in the exhaust duct, and they ask for oil to be heated slowly on a low or medium setting rather than at high heat. Keep a lid that fits your frying pan within reach before the oil goes in, as NFPA and USFA both advise, and keep towels, oven mitts and food packaging clear of the burners. Source: [NFPA — Cooking safety](https://www.nfpa.org/education-and-research/home-fire-safety/cooking) — Unattended equipment is a factor in a quarter of home cooking fires and half the deaths; slide the lid over the pan and turn off the burner, do not remove the cover, never throw water; if the fire does not go out, get everyone out and call the fire department from outside; close the door behind you; have a clear way out; [U.S. Fire Administration — Cooking Fire Safety](https://www.usfa.fema.gov/prevention/home-fires/prevent-fires/cooking/) — Turn the burner off if you see smoke or the grease starts to boil; keep a pan lid or baking sheet nearby to cover a pan that catches fire; if you leave the kitchen, turn the burner off; [Broan — BXT1 Series Range Hood Installation Instructions](https://broan-nutone.com/getmedia/e05acdba-b6be-4e9e-8182-e44db1a97192/Installation-Guide-BXT1.pdf?ext=.pdf) — Do not use water, including wet dishcloths or towels; use only metal ductwork so a grease fire is contained inside it; do not let grease accumulate on the fan, filters or ducts; heat oils slowly on low or medium ## Where to stop After any flame that reached the hood, leave it switched off at the breaker until it has been inspected. Book a visit if the filters are warped, the light lens melted, the breaker tripped or a hot electrical smell remains. Do not climb inside the chimney cover or open the blower housing to look for damage: that is where the motor wiring runs, and it is a job for a technician. Written by [RangeHoodeRepair.center technical team](https://rangehooderepair.center/authors/technical-team/). The crew that fixes kitchen range hoods here, writing from its own service visits and each maker's installation papers. Sources: [NFPA — Cooking safety](https://www.nfpa.org/education-and-research/home-fire-safety/cooking) · [U.S. Fire Administration — Cooking Fire Safety](https://www.usfa.fema.gov/prevention/home-fires/prevent-fires/cooking/) · [Broan — BXT1 Series Range Hood Installation Instructions](https://broan-nutone.com/getmedia/e05acdba-b6be-4e9e-8182-e44db1a97192/Installation-Guide-BXT1.pdf?ext=.pdf) ## Step by step. Four steps, in the order worth doing them. 01 ### Cover the pan Push a lid, or a baking sheet if no lid fits, across the top of the burning pan from the side. 02 ### Turn the burner off Switch off the heat under the pan and leave the pan where it is. 03 ### Leave the cover on Do not lift it to check; let the pan cool completely before removing it. 04 ### Get out if it spreads If the fire does not go out or reaches the hood or cabinets, get everyone out, close the door and call 911 from outside. For the heart of your home. ## Questions owners ask. ### Can I use flour or baking soda on a grease fire? Stick to what NFPA and USFA tell you: cover the pan, then shut off the heat under it. Flour is not on their list, and reaching into the flames with anything loose puts your hand where the fire is. ### Is it safe to use the hood again after a small pan fire? Only after someone has looked at it. A brief flare may leave nothing but soot, but heat can warp the filters, soften the light cover and reach wiring behind the canopy that no owner should open. ### Can the fire travel up the duct? Grease inside a duct can burn. That is why manufacturers require metal duct, which contains a fire better than plastic or foil, and why a hood that had flames drawn into it needs its duct checked. ### Why does the soot smell stay for days? Smoke settles into the filters, the canopy and the first stretch of duct. Washing or replacing the filters usually clears it; a smell of hot plastic or wiring is different and means the hood stays off. ## The problems behind it. Each has a page of its own: what it usually means and the causes in the order worth checking. [All 17 problems](https://rangehooderepair.center/problems/) Stop cooking under it ### Grease Fire Under or Inside a Range Hood 6 causes, cheapest first Stop cooking under it ### Hot Electrical or Burning Smell at the Range Hood 6 causes, cheapest first Problem ### Grease or Oily Water Dripping From the Range Hood 6 causes, cheapest first ## When it needs a technician. The repairs on the right are where this guide ends when the checks do not settle it. ### Range hood diagnostic visit A visit that runs the hood through every speed and light, tests the draw at the filters and follows the air outside until one part is named. ### Range hood filter and baffle service Cleaning or replacing what catches grease and odor: mesh and baffle filters, charcoal pads on recirculating hoods, and the grease channel. ### Range hood damper and duct repair Getting the air out of the house: the backdraft damper, the duct and its joints, the wall or roof cap, and make-up air in a tight house. ## More in grease, fire and air. What to do when a pan catches fire under the hood, when sparks or a burning smell come from it, when the hood starts pulling away from its mount, and how the hood keeps cooking fumes out of the air you breathe. [The whole section](https://rangehooderepair.center/guides/safety-and-food/) Keeping people, the kitchen and the air safe ### A Range Hood Pulling Away From the Wall or Ceiling: Clear the Space Below The gap, the sway and the dust that give it away, why the breaker goes off and nobody props it up, and what studs and ceiling framing have to carry. Keeping people, the kitchen and the air safe ### Cooking Fumes and Indoor Air: What a Vent Hood Actually Removes Smoke, grease mist, steam and combustion gases, why a ducted hood ventilates and a recirculating one only filters, and the habits that let the canopy catch the plume. Guides ### All 18 guides Six sections, by what you are trying to find out. --- **[Read on the site: A Grease Fire Under the Range Hood: Lid On, Burner Off, Never Water](https://rangehooderepair.center/guides/a-grease-fire-under-the-hood/)** **[Book a visit with RangeHoodeRepair.center](https://rangehooderepair.center/schedule/)**