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Commercial Commercial Charbroiler: Burner Won't Light — Causes & Fixes

Compiled by Resultex Media Group · Editorially reviewed · Last verified August 2026

Quick answer: First run the owner-level checks: the building's manual gas shut-off valve and the charbroiler's individual burner valves are ON, the gas supply is actually on (check the LP tank level on propane units), and on standing-pilot models the pilot for that burner is lit. If gas is on and the pilots are lit but a burner still won't ignite, or the pilot itself won't light, stop and call a qualified gas technician. On the manufacturer's own lighting instructions, if the burners fail to light you are told to turn all burner valves and the main gas shut-off to OFF and contact an authorized service agency — the fault is in the gas valve, pilot/orifice, ignition, or gas pressure, none of which are owner-serviceable.
Food safety: If a burner is down, do not hold raw or par-cooked protein in the temperature danger zone (41-135 F) while you wait. Once running, cook to the FDA Food Code 3-401.11 internal temperatures (e.g., poultry 165 F, ground beef 155 F, whole-muscle beef/pork 145 F) verified with a probe thermometer, and discard product held too long. Note: returning food to 41°F does not by itself make it safe. If the time/temperature history is unknown, segregate the product and follow your food-safety plan; the FDA Food Code’s time-as-a-public-health-control provisions require specific written procedures, and local health-department requirements may differ. When safety cannot be verified, discard it.

Check in this order (5-minute diagnostic)

Work top to bottom — the quickest, most-likely checks are first.

  1. Gas supply off, main valve closed, or LP tank empty. Confirm the building manual gas shut-off valve is open, the individual burner valve is turned to MAX/ON, and (on propane) the LP tank still has gas.
  2. Pilot for that burner is out (standing-pilot models). On standing-pilot charbroilers the burner lights off its pilot; look through the pilot sight/access hole to see whether the pilot flame is present.
  3. Obstructed pilot orifice or dirty pilot/runner tube. The pilot sparks/lights weakly or not at all, or the burner is slow to catch from the pilot — a clogged pilot orifice or dirty pilot/runner tube.
  4. Faulty gas valve, thermocouple/safety pilot valve, or ignition. Gas is confirmed on, pilots are lit, but a burner (or pilot) still won't fire — points to the burner gas valve, the safety pilot valve/thermocouple, or the ignition circuit.
  5. Low or insufficient gas pressure. Multiple burners are weak or won't light, especially when several gas appliances run at once — a sign of low supply or manifold pressure.

Likely causes, checks & fixes

Likely causeHow to checkWhat to doWho
Gas supply off, main valve closed, or LP tank emptyConfirm the building manual gas shut-off valve is open, the individual burner valve is turned to MAX/ON, and (on propane) the LP tank still has gas.Open the manual shut-off and the burner valve; refill/replace an empty LP tank. If gas is confirmed on and it still won't light, call a qualified gas technician.DIY-safe
Pilot for that burner is out (standing-pilot models)On standing-pilot charbroilers the burner lights off its pilot; look through the pilot sight/access hole to see whether the pilot flame is present.Relight the pilot per the manufacturer's lighting instructions (see the how-to). If the pilot lights but the burner still won't, or the pilot won't stay lit, call a qualified gas technician.Basic
Obstructed pilot orifice or dirty pilot/runner tubeThe pilot sparks/lights weakly or not at all, or the burner is slow to catch from the pilot — a clogged pilot orifice or dirty pilot/runner tube.Cleaning or clearing a pilot orifice, pilot assembly, or runner tube is a gas-technician task. Do not disassemble it; call an authorized service agency.Technician
Faulty gas valve, thermocouple/safety pilot valve, or ignitionGas is confirmed on, pilots are lit, but a burner (or pilot) still won't fire — points to the burner gas valve, the safety pilot valve/thermocouple, or the ignition circuit.Shut the unit down at the main gas shut-off and call a qualified gas technician. Never disassemble, adjust, or bypass the gas valve, thermocouple, or safety pilot valve.Technician
Low or insufficient gas pressureMultiple burners are weak or won't light, especially when several gas appliances run at once — a sign of low supply or manifold pressure.Have a qualified gas technician verify supply and manifold pressure. Never adjust the regulator or gas pressure yourself.Technician

Who can do it: DIY-safe owner-doable · Basic simple part swap · Technician refrigerant/gas/electrical — call a licensed pro.

How to do the safe fixes

Owner-doable procedures only. Anything on the "Technician" list above needs a licensed pro.

Light the standing gas pilots (radiant charbroiler) Basic
  1. Turn the main gas shut-off valve and all individual burner valves OFF and wait 5 minutes to clear any gas.
  2. Turn the main gas shut-off valve back ON.
  3. Pass the lit ignition source through the pilot access/sight hole in the front panel and light each pilot in turn (the flame end must reach the pilot inside the unit).
  4. Confirm each pilot holds a small, steady flame (a slight yellow tip is normal on a standing pilot); if a pilot won't stay lit, stop and see the 'pilot won't stay lit' section.
  5. Once all pilots are lit, turn the individual burner valves to MAX to light the burners, then adjust to the desired setting.
  6. If any burner fails to light, turn all burner valves and the main gas shut-off to OFF and contact an authorized service agency.

· Tools: Long fireplace/BBQ lighter or match holder (reach at least ~7" past the front panel), Flathead screwdriver (only if the manual calls for a pilot flame adjustment), Heat-resistant gloves · Source: Vulcan/Wolf VACB/ACB Installation & Operation Manual (lighting the gas pilot); Star Ultra-Max manual (pilot lighting - wait 5 minutes, light pilots, then burners)

Relight a safety-pilot / runner-tube model (e.g., MagiKitch'n -S) Basic
  1. Turn all burners OFF. If the pilot just went out, wait 5 minutes before relighting to let residual gas dissipate.
  2. Remove the top grid and, on radiant models, a radiant to reach the runner tube.
  3. Turn the shut-off valve to ON, then press and hold the reset (blue) button on the safety pilot valve and wait 15-30 seconds.
  4. With the reset button still held, light the runner tube; if it doesn't catch, wait a few seconds and try again (first light after connecting gas can take 1-2 minutes).
  5. Keep holding the reset button an additional 15-30 seconds, then release it — the runner tube should stay lit. If it goes out, repeat; if it fails after three attempts, contact an authorized service agent.
  6. Replace the radiant and top grid, then push and turn the individual burner valves to light the burners.

· Tools: Long ignition source, Heat-resistant gloves · Source: MagiKitch'n 600 Series Gas Broiler Installation-Operation-Maintenance manual (RMB/SMB -S models with safety pilot)

Clean the grates, radiants, and lava rock (safe daily/periodic cleaning) DIY-safe
  1. Scrape the top grates with a wire brush during and after service, cleaning the underside of the rods so grease keeps draining forward.
  2. When the unit is cool, remove the grates and radiants and clean away fat, grease, and food; soak grates in degreaser (overnight if heavily caked), rinse thoroughly, dry, and re-oil to prevent rust.
  3. Reinstall one radiant per burner (never run the unit without radiants).
  4. For lava-rock units, monthly remove the rock, soak it overnight so grease separates, clean the lava grates, drain, and replace the ~2" pieces about one layer thick (never exceed the manufacturer's rock limit).
  5. Empty and wash the water pan/tub, grease box, and crumb/deflector trays; keep deflector-tray holes clear and reinstall trays correctly.
  6. Do not scrape or poke the burners or their ports, and do not use a water jet on the unit.

· Tools: Wire grill brush and scraper, Heat-resistant gloves, Detergent/degreaser or approved commercial grate cleaner, Bucket (for lava-rock soak) · Source: Vulcan/Wolf VACB/ACB manual (cleaning grates, radiants, trays); Star Ultra-Max manual (grate/water pan/lava rock cleaning); MagiKitch'n 600 (daily cleaning and maintenance)

Keep burner ports and the burner area clear (what's owner-safe vs. technician-only) DIY-safe
  1. With the unit OFF and cool, remove the top grates and radiants (or lava rock) and brush away carbonized debris that has fallen onto and around the radiants/burner shields.
  2. Wipe the burner area free of loose crumbs and grease so debris isn't sitting where it can block combustion; keep the crumb/deflector tray clean and the air-inlet area at the bottom/front of the unit unobstructed.
  3. Do NOT run a brush, wire, or tool into the burner ports, and do not remove burners, orifices, or the air shutters to 'clean' them — port, orifice, and shutter cleaning on gas equipment is a qualified-technician task.
  4. If burners are burning unevenly, have visibly blocked ports, or produce yellow/lifting flames after this cleaning, call an authorized gas service agency rather than disassembling anything.

· Tools: Wire brush/scraper, Heat-resistant gloves · Source: Star Ultra-Max manual ('brush out carboned particles'); Vulcan/Wolf VACB/ACB manual (radiants/burners; burner and shutter adjustment by trained personnel; annual technician inspection)

Stop and call a qualified technician if:
Repair or replace? A gasket, coil cleaning, or a simple part is almost always worth fixing. Weigh replacement when the unit needs a compressor or sealed-system repair and is roughly 8–10+ years old, or when repeated service calls approach the cost of a new unit. Compare current commercial charbroilers →

Related commercial charbroiler problems

Frequently asked questions

Why is my commercial charbroiler burner won't light?

First run the owner-level checks: the building's manual gas shut-off valve and the charbroiler's individual burner valves are ON, the gas supply is actually on (check the LP tank level on propane units), and on standing-pilot models the pilot for that burner is lit. If gas is on and the pilots are lit but a burner still won't ignite, or the pilot itself won't light, stop and call a qualified gas technician. On the manufacturer's own lighting instructions, if the burners fail to light you are told to turn all burner valves and the main gas shut-off to OFF and contact an authorized service agency — the fault is in the gas valve, pilot/orifice, ignition, or gas pressure, none of which are owner-serviceable.

When should I call a technician instead of fixing it myself?

Call a licensed technician for anything involving the sealed system, refrigerant, gas, or high-voltage wiring — for example: Obstructed pilot orifice or dirty pilot/runner tube; Faulty gas valve, thermocouple/safety pilot valve, or ignition; Low or insufficient gas pressure. These are diagnostic-only for an operator.

Is it worth repairing or replacing?

Simple fixes (gaskets, coil cleaning, a single part) are worth repairing. Consider replacing when it needs a compressor or sealed-system repair and is 8–10+ years old, or when repeat service calls near the price of a new unit.

Sources