My gas stove burner won’t turn off — what do I do?
A gas burner that keeps burning after the knob is off has a valve failing to close — act now: stay with the stove, turn all knobs firmly off, and shut the range’s gas supply valve. The flame dies as the trapped gas burns off. A stuck valve is a technician-only repair; DIY ends at the knob. Identify your model number so the technician can order the correct valve.
Need step-by-step instructions for your specific brand and model? Visit our DIY Repair Guide and filter by appliance and brand.
Safety information
A gas burner that will not shut off is a gas emergency. Shut off the range’s gas supply valve immediately — it is on the gas line behind or beside the range. If at any point the flame goes out while gas may still be flowing, or you smell gas: do not relight, do not operate any switches, ventilate on the way out, leave the home, and call your gas utility or 911 from outside. Leave the burner valve repair to a qualified technician — do not disassemble, clean, or attempt to re-seat a gas valve yourself. Keep the range’s gas supply off until the valve is replaced.
Most common causes
- Failing burner control valve — the valve’s internal seal or stem no longer closes fully, so gas keeps feeding the flame with the knob off; the technician-repair cause and the most common.
- Stripped or broken knob — the knob turns without turning the valve stem beneath it, so the valve was never actually closed; the one DIY-fixable cause.
- Debris or grease in the valve — boilover residue migrates into the valve stem and holds it off its seat; still a technician repair, as the valve must be opened or replaced.
- Bent or jammed valve stem — impact or a pot strike on the knob bends the stem so it can’t rotate to closed.
- Confusion with residual flame — a burner flickering out over a few seconds after shutoff is normal; a flame that persists beyond several seconds is not.
Step-by-step diagnosis
- Stay with the stove — do not leave a burning burner unattended. Turn every knob firmly to its off detent, and remove anything on or near the burner. If the flame remains burning steadily beyond a few seconds, move directly to shutting off the gas supply.
- Shut the range’s gas supply valve. It is on the gas line behind or beside the range — the flame typically dies within seconds as the trapped gas burns off. If the range can’t be moved safely while a burner is lit, use the next shutoff upstream: the meter valve (natural gas) or tank valve (propane), turned a quarter-turn so the handle sits crossways to the pipe.
- If at any point the flame goes out on its own while gas may still be flowing — or you smell gas — stop: do not relight, do not operate switches, ventilate on the way out, leave the home, and call your gas utility or 911 from outside. Unburned gas is the dangerous scenario; a controlled flame is comparatively stable.
- With the gas supply off and the range cool, pull the knob off its stem and inspect it. A stripped, cracked, or spinning knob means the valve may be fine — the knob just wasn’t turning it. Rotate the bare stem gently with pliers to the off position and replace the knob; this is the one repair safely done at home.
- Leave the valve itself to a qualified technician. If the stem was truly at off and gas still flowed, the burner valve has failed internally. Valves are gas-carrying components — do not disassemble, clean, or re-seat them yourself. Keep the range’s gas supply off until the valve is replaced.
- Have the technician check the manifold and remaining valves during the repair. The grease migration or wear that failed one valve is often underway in its neighbors, and a leak-test of the manifold after any valve replacement is standard practice.
- Prevent the repeat. Clean boilovers promptly before residue migrates behind the knobs, replace worn knobs so their grip on the stem stays positive, and consider knob covers in homes with children — a bumped knob that won’t fully close is this same emergency in slow motion.
Replacement parts to consider
Common parts for this repair: burner control knob, burner valve (technician-installed). Enter your range’s model number on reliableparts.com for the exact parts for your specific model.
Related FAQs
What should I do first if my gas burner won’t turn off?
Stay with the stove, turn all knobs firmly to off, and shut the gas supply valve on the line behind or beside the range. The flame will die as the trapped gas burns off. Do not leave it unattended and do not try to put out a gas flame with water — eliminating the fuel source (closing the valve) is the correct action.
Can I fix a gas burner valve myself?
Only the knob is a DIY repair. Pull the knob off and check if the stem beneath it is turning freely with the knob — a stripped knob grip means the valve was never actually closing. Replace the knob and the problem is solved. The valve itself is a gas-carrying component and must be replaced by a qualified technician with the gas supply off.
Why does my gas burner flicker before going out?
A brief flicker and burn-down of 3–5 seconds after shutoff is normal — the gas in the supply tube and orifice burns off. A flame still burning steadily 10+ seconds after the knob reaches off is not normal and points to a valve that isn’t closing. Shut the supply valve and call a technician.
How do I shut off the gas to my range?
The range’s supply valve is on the flexible connector or rigid pipe behind or beside the unit — a ball valve (handle parallel to the pipe = open, crossways = closed) or a straight-slot shutoff (slot parallel to pipe = open). If you can’t reach it safely, the next shutoff is the main meter valve outside the home, or the tank valve on a propane system.
How much does a gas burner valve replacement cost?
A replacement burner valve typically runs $40–120 for the part. Professional installation generally adds $100–200 in labor, plus a leak-test of the manifold. Replacing a stripped knob is $10–30 and fully DIY. Never defer this repair — a valve that won’t close fully is a continuous gas-leak risk.
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