Stop now — do not troubleshoot further If any of the following apply, stop reading and act on safety first. Do not reset safety devices, bypass limits, or open gas or refrigerant lines.
  • Gas odor or suspected leak — leave the area; do not operate switches, pilots, or electrical equipment; call your gas utility or 911, then a licensed gas technician.
  • Fire, smoke, flames, or grease fire — use your site fire plan; call 911 if needed; do not restart equipment until inspected.
  • Carbon monoxide alarm or headache/nausea near gas equipment — ventilate, evacuate, and call for service.
  • Repeated high-limit, pressure, or breaker trips — one reset is not a fix; continued operation can damage equipment or cause injury.

Important: These guides are general information for commercial operators, not step-by-step repair instructions for untrained persons. You are responsible for following manufacturer manuals, local codes, and your insurer’s requirements. A/C Dr. Naz is not liable for injury, property damage, food loss, or code violations that result from actions taken based on this content. When in doubt, call a licensed professional.

Caution Power off at the labeled disconnect before cleaning condenser coils or reaching inside panels. Where a guide allows a single control reset, try it once only — if the fault returns, stop and schedule service.
Safe checks Thermostat setting, doors closed, visible gasket damage, and breaker position — visual checks only unless noted.

Commercial Range Gas Pilot Won’t Stay Lit

Direct answer: When a commercial range pilot won’t stay lit, the cause is usually a clogged pilot orifice, a weak pilot flame that does not heat the thermocouple, or a failed thermocouple that cannot hold the safety valve open — not simply “turn up the gas.”

Any gas odor is a stop condition — see the red block above. Service: commercial kitchen appliance repair.

Safe checks before you call

Work through these in order. Stop at any red condition above.

  1. Safe check If you smell gas, do not operate switches or pilots — evacuate and call your gas utility or 911 first.
  2. Safe check With no gas odor, note whether the pilot flame is blue and wraps the thermocouple tip — a weak or lifted flame cannot hold the valve.
  3. Safe check Confirm burners are reassembled correctly after cleaning — misaligned caps can blow out pilots.
  4. Caution Do not bypass or disable safety valves, thermocouples, or gas controls — that creates leak and fire risk.
  5. Caution — once only One careful relight attempt per manufacturer procedure — if the pilot will not stay lit, stop and call a licensed gas technician.

Likely causes (what we diagnose on site)

When safe checks do not restore operation, we follow sequence of operation before replacing parts:

Pilot and thermocouple — Clogged orifices, weak flames, and degraded thermocouples that no longer generate millivolts to hold the safety valve.

Gas pressure and manifold — Manifold pressure and regulator issues — verified with proper gauges by qualified technicians.

When to call a technician

Call if gas odor is present, the pilot will not stay lit after one safe relight attempt, or multiple burners fail together.

Need repair, not troubleshooting? Commercial kitchen appliance repair · Greater Seattle & Puget Sound

Why won’t my commercial range pilot stay lit?
Usually a clogged pilot orifice or degraded thermocouple. If the pilot flame is too small to wrap the thermocouple, the safety valve shuts off gas flow.
Can I adjust the pilot myself?
Only per manufacturer instructions and only when no gas odor is present. Do not bypass safety valves. Persistent failure needs a licensed gas technician.
Is a yellow pilot flame OK?
A weak or yellow flame may not heat the thermocouple properly. Stable blue flame wrapping the sensor is the normal target — chronic yellow flame warrants service.

Pilot still won’t stay lit after safe checks?

Call (425) 535-8990 Request callback

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