How to Fix a Gas Burner That Won't Light

Gas burners fail to light for a handful of predictable reasons, and most of them you can fix in under an hour without calling anyone. The igniter—that little ceramic or metal spark-maker under the burner cap—gets gummed up with food debris and mineral deposits. The burner ports themselves clog. Or the gas valve gets stuck or the line gets pinched. What matters is that you approach this methodically: check spark first, then gas flow, then the burner itself. Done right, you'll have flame again before dinner. This repair requires patience more than skill. You're doing detective work with a burner, not tearing into an engine. A can of compressed air, some wire, a little vinegar, and your own eyes will get you there. The stove stays in the kitchen, you work at your own pace, and every step is reversible.

1. Turn off the stove and let it cool. Kill the power at the breaker or unplug the electric ignition module if your stove is plug-in. If the burner is still warm, let it cool for at least 15 minutes. Gas stoves are safe when cold and unpowered.
2. Remove the burner cap and grate. Lift the burner cap straight up—it usually sits on a post and comes free easily. Set it aside. If your stove has a removable grate, lift it away too. You now have a clear view of the burner head and igniter underneath.
3. Inspect the igniter for carbon buildup and corrosion. Look at the small ceramic or metal igniter tip where the spark happens. Food debris, grease splatter, and corrosion create a white, black, or rusty coating that stops spark. Use a dry cloth or soft brush to gently wipe the igniter tip clean. Don't scrub hard—just remove loose material. If buildup is stubborn, dampen the cloth slightly with white vinegar and wipe again.
4. Clear the burner port holes. The burner head has small holes around its edge where gas flows into the flame. Food particles and mineral deposits clog these. Use a thin wire, straightened paperclip, or the needle tool on a multi-tool to gently poke each hole. Work around the entire burner. Follow up with a burst of compressed air to blow out loose debris. Wipe the burner head with a damp cloth and dry it completely.
5. Test the spark with the burner reassembled. Replace the burner cap and grate. Turn the stove back on at the breaker or plug it in. Turn the burner knob to the ignite position and listen for clicking. You should hear rapid clicking and see a small spark at the igniter tip. If you see spark and hear clicking, the igniter works—move to the next step. If no spark or clicking, the igniter module likely needs replacement.
6. Check that gas is flowing to the burner. Turn the burner knob all the way to light. Hold it there for 3 seconds while the igniter sparks. You should smell gas and hear a slight hiss. If you smell gas but no flame ignites after 10 seconds of sparking, the gas is flowing but something else is preventing ignition—usually moisture on the igniter. If you smell nothing, the gas line to that burner is blocked or the valve is closed.
7. Dry the igniter if it's damp. If gas is flowing and spark exists but the burner won't ignite, moisture on the igniter is the culprit. This happens after cleaning or spilled liquid. Turn off the burner. Use a hair dryer on low heat, held 6 inches from the igniter tip, for 30 seconds. Let it cool for 2 minutes. Try lighting again. Repeat once more if needed.
8. Verify normal operation and clean the exterior. Light the burner and let it burn for one minute at medium heat. The flame should be blue with maybe a thin yellow tip. If it's all yellow or orange, ports are still partially clogged—repeat the port-clearing step. Once the flame is clean blue, turn it off. Wipe down the exterior of the cap and grate with a damp cloth to remove any vinegar or cleaning residue.