Gas Burner Clicking But Not Lighting? Read This First

A burner that clicks but will not light almost always comes down to four things: food debris in the burner ports, moisture on the igniter after a cleaning or a boil-over, a cracked ceramic igniter, or a burner cap that is not seated. Turn the knob off before anything else, because a clicking burner with the knob open is releasing gas into your kitchen. A homeowner can safely clean ports and dry an igniter. Nobody outside a licensed technician should touch the gas valve, the orifices, or the supply line.

If you smell gas, leave the house

Nothing else here matters if the answer is gas in the air. Utilities add mercaptan to natural gas so it smells like rotten eggs or sulfur. If you smell that:

• Do not flip any light switch, on or off. A switch arcs.
• Do not use your phone inside, and do not run the garage door opener.
• Do not light anything, including a match to check.
• Get everyone out and leave the door open behind you.
• From well outside, call your gas utility's emergency line. The number is on your gas bill.

Call the utility, not a repair company. We cannot respond to a suspected leak. Once they have cleared the house, an appliance company can look at the range. A faint whiff for a second while a burner catches is normal combustion. A smell that persists is not.

Turn the burner off first

The clicking is the spark module firing high voltage across the electrode. It runs only while a knob is in the lite position, and while that knob is open the safety valve is open too, so gas is flowing whether or not it ignites.

Turn the knob off and wait five minutes with a window open before trying again. If the burner failed to light for more than a few seconds, do not reach in with a lighter or a match. You would be lighting a pocket of accumulated gas rather than a fresh stream, and that gives you a flash instead of a flame.

Then there is the version that drives people out of the kitchen: clicking that continues with every knob off. That usually means liquid got into a switch during a boil-over. Unplug the range or shut off its breaker and the clicking stops. Leave it off 24 to 48 hours to dry, because continuous firing is one of the things that kills modules.

Food debris in the burner ports

The burner head is the metal ring with a row of small slots around its edge. Those are the ports. When a pot boils over, sugar, starch and grease run into them and dry into something like enamel.

The symptom is specific: only part of the ring lights, the flame crawls partway around and stops, or one section burns yellow while the rest burns blue. On natural gas a healthy flame is blue with a defined inner cone. Yellow, lazy or sooty flames mean incomplete combustion.

You can clean ports safely. With the knob off and the burner cool, lift off the cap and then the head if it lifts free. Wash both in hot soapy water and let them dry fully, which takes longer than you think. Clear each port with a straightened paper clip or a sewing needle. Not a wooden toothpick, because it breaks off inside the port. Not a drill bit or a knife either, because widening a port changes the gas-to-air ratio and leaves a flame that will never burn right. The electrode, the white ceramic pin beside the burner, does not come off and does not go in the sink.

Seat the cap carefully when you reassemble. It has to sit flat and centered, and many burners have a notch that lines up with the head. A cap cocked by a millimeter spreads the gas wrong, so the flame will not carry around the ring. Caps are sized per burner and are not interchangeable, so clean one burner at a time.

A wet igniter after cleaning or a spill

This is the most common harmless cause. Moisture on the ceramic insulator lets the spark leak to ground instead of jumping the gap. You hear clicking, see nothing, and conclude the igniter is dead.

Give it time. Unplug the range, wipe up standing liquid, and let it sit 24 to 48 hours with a fan pointed at the cooktop. Do not use a heat gun or a hair dryer on high, which can crack the ceramic or damage wiring insulation. This happens constantly here in July and August, when a kitchen without good ventilation holds enough moisture to produce phantom clicking with nothing spilled at all.

A cracked igniter or a failed spark module

If it is dry and still will not spark, turn the kitchen lights off and watch during a lite attempt. You are looking for where the spark actually goes.

A healthy electrode throws a crisp blue-white spark from its tip across a short gap to the burner base or cap. A cracked ceramic insulator lets the spark escape at the crack instead, so you see it arcing sideways low on the electrode, or see nothing while still hearing clicks. Cracks come from impact, a pot set down hard, or thermal shock. The electrode and its lead are replaced as one assembly.

The spark module steps household voltage up to the thousands of volts a spark needs. Two things point to it: no click at all from any burner, or every burner clicking continuously after two days of drying. That is a technician part, because replacing one means working inside the range where the gas manifold lives.

Most spark and igniter repairs fall inside our usual $150 to $400 range for parts and labor, with a one year warranty. See the full list under oven and range repair.

What a homeowner should never touch

Everything above is on the outside of the appliance. The line below it is firm.

• Do not adjust the gas valve, the orifices, or the air shutter. Those set the fuel-air mixture, they require a manometer and the correct orifice for your fuel, and a wrong adjustment makes carbon monoxide.
• Do not touch the flexible supply connector behind the range. Those lines work-harden, and flexing one that has sat for years is how a leak starts. If the range has to come out, that is our job.
• Do not put pipe dope or thread tape on gas fittings to chase a smell.
• Do not relight a standing pilot unless you know the exact procedure for that model.
• Do not convert a range between natural gas and propane yourself.

Two more things plainly. Persistent yellow, sooty flames warrant a service call, not a wait-and-see. And every home with gas appliances needs working carbon monoxide detectors.

Call (816) 555-0123. The $109 diagnostic fee is credited to the repair when you approve the written quote. We cover 83 communities within 60 miles of downtown, both Missouri and Kansas sides, with no trip charge inside 35 miles. Check your address on our service areas page.