---
title: "Gas burner will not light"
description: "Bosch gas burner will not light — igniters clicking without catching, a burner that lights and goes out, or a flame that has turned yellow."
url: "https://boschmiami.support/symptoms/gas-burner-wont-light/"
date_modified: "2026-08-18"
Appliance type: "Cooktops & rangetops, Ranges"
---


# Bosch gas burner will not light

### The fastest diagnosis is the code

There is no code for this — gas burners do not report to a display. What replaces it is one question: is it one burner or all of them? One is that burner. All of them is upstream, at the module or the supply.

### The fastest diagnostic there is

One burner misbehaving is that burner: the cap, the ports, the electrode. Every burner at once is upstream: the ignition module, the supply, or the power to the module. Establishing which takes seconds and it decides everything after it.

### What you can safely do yourself

With the burners off and completely cold: lift the cap, check it sits flat and square, and look at the ports for anything baked into them. That is the whole home-repairable list, and it is behind a surprising share of these calls.

The burner cap out of position

A millimeter proud and the burner will not catch. The most common cause and it costs nothing — lift it, seat it square, try again.

Blocked ports

A boil-over that dried in the holes around the burner. Clears with a pin or a stiff brush, cold and with the gas off.

A wet or dirty electrode

After a spill or a clean. It sparks weakly or in the wrong place. Drying it and giving it a day often does it.

The flame sensor

If the burner lights and goes out the moment you release the knob, the sensor is not confirming the flame — a safety device doing its job with a failing part.

The ignition module or supply

When no burner will light. That is upstream and it is a real repair rather than a clean.

One burner or all of them?

The first question, and it removes most of the possibilities immediately.

Lift the cap and reseat it

Cold, with the burner off. It should sit flat and square in its recess with no gap on one side.

Look at the ports

The small holes around the burner ring. Anything baked into them stops the flame traveling around the ring.

Dry everything and try tomorrow

If it started after a clean or a spill, give it a day. Moisture around the electrode is a real and common cause.

One burner or all of them

What it usually means

Clicks but does not catch

Lights, then goes out when released

A yellow or lifting flame

The fastest diagnosis is the code

There is no code for this — gas burners do not report to a display. What replaces it is one question: is it one burner or all of them? One is that burner. All of them is upstream, at the module or the supply.

The fastest diagnostic there is

One burner misbehaving is that burner: the cap, the ports, the electrode. Every burner at once is upstream: the ignition module, the supply, or the power to the module. Establishing which takes seconds and it decides everything after it.

What you can safely do yourself

With the burners off and completely cold: lift the cap, check it sits flat and square, and look at the ports for anything baked into them. That is the whole home-repairable list, and it is behind a surprising share of these calls.

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