How grill ignition works
Most gas grills use spark ignition. A module behind the control panel builds up a high-voltage pulse, sends it down a thin insulated wire, and the pulse jumps from the metal tip of a ceramic electrode to the burner. If gas is flowing at that moment, the burner lights. There are two styles of module: a push-button battery module, and a rotary or piezo striker built into the knob or a separate button. Some premium built-ins run the module off a 120-volt transformer, and a few brands use hot surface igniters that glow instead of spark.
This page covers the electrode and wire end of the system. If the module itself is dead, see electronic ignition module repair.
Signs the igniter is the problem
- The module clicks, but you see no spark at one burner, or the spark is faint and orange instead of blue-white.
- Spark jumps from the wire to the grill body somewhere behind the panel instead of at the burner.
- The ceramic insulator on the electrode is cracked or chipped.
- The tip is buried in carbon or bent away from the burner.
- The burner lights with a match every time but never from the button.
- The wire insulation is cracked, melted, or the connector at the module is loose or corroded.
What we find, and how often
| Cause | How common | Usual fix |
|---|---|---|
| Carbon and grease on the electrode tip | Very common | Clean and regap |
| Electrode knocked out of position during cleaning | Common | Reposition and secure |
| Cracked ceramic insulator | Common on older grills | Replace electrode |
| Brittle or melted wire shorting to metal | Common on built-ins | Replace wire or electrode assembly |
| Corroded connector at the module | Common near the coast | Clean or replace terminal |
| Burner moved so the gap is wrong | Occasional | Seat burner on orifice, regap |
What a homeowner can check
With the gas off and the grill cool, pull the grates and heat plates and look at each electrode. A dry toothbrush or a cotton swab with a little rubbing alcohol cleans the tip. The gap between the tip and the burner should be about an eighth of an inch on most grills, roughly the thickness of two stacked coins. If the electrode has a bracket and screw, it should be snug.
Then put in a fresh battery, step into the shade and press the igniter. Watch every burner. A crisp spark everywhere and still no flame means the problem is gas flow, not ignition, and the usual suspect is spiders in the burner tubes.
Leave it there. Replacing electrodes often means pulling burners and routing new wire behind the valve manifold, and that's close enough to the gas parts that we'd rather handle it.
How we replace an igniter
- 1
Identify the part
Electrodes differ in length, tip shape, mounting bracket and connector. We match the grill's model tag, or match the old part by hand when a tag is missing.
- 2
Pull grates, plates and burners
This gives us room to remove the old electrode and lets us check the burner it sparks to. A burner with rusted-out ports won't light well no matter what igniter it has.
- 3
Route the new wire
The wire runs back to the module away from the burner heat, clipped where the original was, so it doesn't sag onto hot metal and melt again.
- 4
Set the gap and test
We set the gap, reinstall the burner on its orifice, and light each burner from the button several times in a row.
OEM or universal?
Universal electrode kits exist and some work fine. The catch is fit: a tip that sits a few millimeters off, or a wire that's too short and runs across a hot spot, gives you a grill that lights some days and not others. On premium brands like Lynx, DCS and Viking we prefer OEM parts. Our OEM vs. universal parts guide explains where the cheaper option is fine and where it isn't.
Igniter questions
How long do igniters last?
There's no fixed lifespan. Electrodes on a grill that gets cleaned regularly can last many years. On a grill that floods with grease or sits uncovered near the ocean, they can fail in a couple of seasons.
Should I replace all the igniters at once?
Not automatically. If one has failed from age and the rest look the same, it often makes sense to do them together while the burners are out. If one was bent during cleaning, we just fix that one.
My spark is fine but the burner still won't light. Is it the igniter?
Probably not. A good spark with no flame usually means gas isn't reaching the burner properly: a blocked venturi, a clogged orifice, or a propane regulator in bypass. See our page on a grill that won't light.
Do you carry igniters on the truck?
We carry common electrodes, wires and universal kits, and OEM parts for many popular premium models. Less common parts may need to be ordered.
What does igniter replacement cost?
It depends on the brand, how many burners need it and how hard the wiring is to reach. Send a photo of the model tag and we'll quote it.
Related guides
BBQ Grill Repair
On-site repair for gas grills: ignition, burners, valves, regulators, gas leaks and the hardware that wears out, with common parts carried on the truck.
Buying adviceOEM vs. Universal Grill Parts
Which grill parts are fine to buy universal, which should always be original, and how to measure so a replacement actually fits.
Care & how-toFinding Your Grill's Model and Serial Number
Where grill makers hide the rating plate, how to read it when it's faded, and what to do if it's gone. Saves time and wrong parts on any repair.
Care & how-toWhat to Expect on a Grill Repair Visit
A walk-through of a mobile grill repair visit, from what to send ahead of time to the gas checks and testing before the tech leaves.
Get every burner lighting again
Call or text us, or send a couple of photos of the electrodes and model tag. We'll tell you what it needs.