Stove burner stays on high other work — other burners work

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Turn the affected surface control to OFF from a standing, well-ventilated position and observe the burner without reaching over it or touching the grate.

   Expected result: Record whether the flame extinguishes promptly, drops but remains lit, stays at full height, makes a roaring or hissing sound, or produces a gas odor.

   Next step: Leave the affected burner unused and arrange qualified service for any failure to extinguish, persistent full flame, abnormal noise, or gas odor; do not repeatedly cycle the knob.

   Stop if: If gas is smelled or the flame cannot be shut off, leave the area, avoid switches or ignition sources, and contact the gas utility or emergency service from a safe location.

   Why this matters

   Why: A flame that does not go out or does not respond to OFF suggests a control or gas-valve fault and is unsafe to keep testing. A flame that goes out but will not turn down points toward low-setting control, cap/port, fuel, or conversion issues.

2. Check 2

   With the burner lit only when it can be monitored safely, move the affected knob through the normal high-to-low range once and compare its response with a working burner; do not force the knob or operate a burner that failed to turn off.

   Expected result: Record whether the affected flame changes smoothly, changes only near the end of travel, remains high at low, the knob feels loose or binds, or other burners respond normally.

   Next step: Keep the burner off if its low setting is not controllable and give the response comparison to a technician; do not remove the valve or attempt a gas adjustment.

   Stop if: Stop immediately for a flame that will not extinguish, gas odor, unstable flame, or a knob that must be forced.

   Why this matters

   Why: A smooth but oversized flame suggests cap, port, fuel, or model-specific adjustment. A knob that binds, slips, or produces no change points more toward the knob/shaft or valve. Normal response from other burners supports a localized fault rather than a general supply change.

3. Check 3

   After turning the control OFF and allowing the surface to cool completely, inspect the affected burner cap and base from ordinary access; remove the cap only if the owner's manual permits it and keep each cap with its matching burner.

   Expected result: Record a cap that is centered and flush, a wrong or shifted cap, visible moisture after cleaning, food debris, a warped or cracked cap, or damage that cannot be judged without disassembly.

   Next step: Dry and reseat only as the manual directs, then perform one supervised comparison; arrange service if the cap is damaged, cannot sit flush, or the high flame remains.

   Stop if: Do not swap caps between burners, operate with a missing cap, use a cracked part, or force a cap or base off the cooktop.

   Why this matters

   Why: A wet, wrong, or poorly seated cap can create an uneven or apparently high flame. A damaged cap or base can alter flame distribution and needs the exact model's replacement guidance. A correctly seated, dry cap makes a control, port, fuel, or adjustment issue more likely.

4. Check 4

   With the burner cool and the gas control OFF, inspect visible burner ports and slots for food, grease, or cleaning residue and clean only with the method and tool specified by the installed manual; do not enlarge or distort any port.

   Expected result: Record clean, evenly open ports; localized blockage; moisture or residue; a damaged/warped burner; or ports that cannot be accessed without removing gas components.

   Next step: Dry and reinstall the burner exactly as directed, then check whether the flame becomes even and responds to low; call service if the condition persists or the port requires disassembly.

   Stop if: Do not drill, ream, scrape aggressively, use a wooden fragment, use a dishwasher unless the manual explicitly permits it, or adjust the gas orifice.

   Why this matters

   Why: A localized blockage or residue can make flames uneven or redirect flame, while a damaged burner or inaccessible port requires model-specific service. Cleaning will not correct a knob or valve that does not regulate gas flow.

5. Check 5

   Read the range rating label and manual to identify natural gas or LP operation, and record any recent installation, fuel conversion, regulator work, or burner-part replacement without opening the regulator or gas manifold.

   Expected result: Record no recent change, a recent natural-gas-to-LP or LP-to-natural-gas conversion, unknown fuel type, a mismatch between the label and supply, or a high flame on more than one burner.

   Next step: Stop using the range if fuel type or conversion is uncertain and have the installer, gas utility, or qualified appliance technician verify the conversion and settings against the exact model.

   Stop if: Do not change orifices, regulator settings, fuel connections, or air shutters yourself, and never operate a range with an unresolved fuel mismatch.

   Why this matters

   Why: A recent or uncertain conversion can cause flames to be too high if the appliance was not converted correctly. High flames across several burners point more toward fuel, regulator, or conversion than a single cap; a one-burner problem with unchanged fuel points toward local parts or control.

6. Check 6

   From a safe distance during one supervised operation, observe the flame color, shape, sound, and contact with the grate or pan; use the vent hood and do not use the range as a room heater.

   Expected result: Record a stable mostly blue flame appropriate to the fuel, persistent yellow or orange flame, lazy or wavering flame, flame lifting from the ports, soot, roaring, or flame contacting the grate.

   Next step: Turn the burner off and obtain qualified service for abnormal color, soot, noise, lifting, or flame contact; do not tune combustion by guesswork.

   Stop if: Stop immediately for gas odor, smoke, headache/dizziness, a roaring or flashback-like sound, or any flame that cannot be controlled.

   Why this matters

   Why: Persistent abnormal color, instability, soot, or noise can indicate poor combustion, blocked or damaged burner parts, incorrect fuel-air adjustment, or pressure/conversion trouble. A flame that remains high even when blue still needs control or adjustment diagnosis if the low setting is ineffective.