Pilot light won't stay lit

Symptoms

• Pilot flame goes out shortly after lighting
• Pilot lights but burners won't ignite from it
• You have to relight the pilot repeatedly
• Pilot flame looks small or flickery

Likely causes

• CommonWeak or worn thermocoupleThe thermocouple must sense the pilot's heat to keep the gas valve open; a worn one shuts gas off too soon.
• CommonDraft blowing out the pilotAir currents from vents, windows, or the range hood can extinguish a small pilot.
• PossibleClogged pilot orificeDust and debris can restrict the tiny gas opening that feeds the pilot.
• Less commonFaulty gas valveA failing valve can intermittently cut supply to the pilot.

What to do

1. Turn off the gas supply and let any residual gas clear for a few minutes before relighting.
2. Follow the range's pilot lighting instructions, usually turning a knob to pilot and holding a lit match or lighter near the pilot opening.
3. Once lit, hold the knob in as instructed for about 30–60 seconds to let the thermocouple heat up before releasing.
4. If it goes out right when you release the knob, the thermocouple is likely worn and needs replacement.
5. Check for obvious drafts near the range, like a nearby window or vent, and see if closing them helps it stay lit.
6. If the flame looks small, gently clean around the pilot opening with a soft brush, avoiding widening the hole.
7. If it still won't stay lit after these steps, have a technician inspect and replace the thermocouple or valve.

Tools and parts

• Lighter or long match
• Soft brush

When to call a pro

If the pilot won't hold after a couple of tries, or you're unsure about the process, call a technician rather than repeatedly relighting it.

Safety