---
title: "Your Thermador Cooktop Keeps Clicking After the Burner Lights"
description: "A gas burner that lights and keeps clicking, or every burner clicking at once. What causes it on a Thermador sealed burner, what to clean, and when the spark module"
url: "https://thermadormiami.support/blog/thermador-cooktop-keeps-clicking/"
date_modified: "2026-08-18"
Category: "Common Problems"
---


# Your Thermador Cooktop Keeps Clicking After the Burner Lights

## Why a lit burner keeps sparking

The cooktop sparks until it is satisfied there is a flame where there should be one. If the flame is there but the appliance cannot confirm it — because the burner cap is a fraction out of place, or because there is moisture around the electrode — it keeps trying.

So the clicking is not a random annoyance. It is the cooktop saying it cannot see what you can see.

## The three causes, in the order they turn up

### 1. The burner cap is not seated

**A millimeter out is enough.** The cap has to sit exactly where it belongs for the flame to carry evenly round the ring, and it is easy to leave slightly proud after cleaning.

Let everything cool. Lift the cap, look at the ring of ports underneath, put it back and feel it drop into place. It should not rock.

### 2. Moisture

Water in and around the ceramic of the electrode, after a spill, a boil-over or a wash. The ceramic holds it far longer than the surface suggests, which is why "it started after I cleaned it" is such a common story.

Dry everything — under the caps, around the electrodes, the whole top — and give it a full day before concluding anything.

### 3. Blocked ports

Dried sugar or starch from a boil-over sits in the ring of small holes under the cap. Clear them with **a pin**, never with anything that widens them: the port size sets the flame, and a widened port is permanent.

## If every burner clicks at once

That is the ignition system as a whole rather than one burner, and moisture is the usual answer — after a spill that ran under the cooktop, or a wash where water found its way past the seal.

Dry it, wait, and try again. If every burner still clicks constantly on a dry, clean cooktop, the **spark module** is the part behind all of them, and that is a repair rather than a clean.

## Things worth checking while you are there

- **Does it light and burn cleanly?** Light it with a match. A burner that burns properly by hand has gas and a clear port, which points the whole diagnosis at ignition — the cheaper half.- **What color is the flame?** Blue and steady is right. Yellow or lifting off the ports is combustion rather than ignition, and that one is worth a call rather than a wait.- **Is it one burner or all of them?** The single most useful sentence you can give us on the phone.

**Any smell of gas is not on this page.** Shut the gas off at the appliance valve, ventilate the room, and call. Nothing here applies until that is dealt with.

## When to call

- Clicking continues on a clean, dry, correctly seated burner- Every burner clicks constantly after a full day of drying- The flame is yellow or lifts away from the ports- A burner lights and then goes out on its own

Electrodes are inexpensive and crack from spilled liquid; the spark module is the part behind them. Both are ordinary repairs, and [what they involve is here](/services/gas-burner-and-igniter-repair/) along with what the job starts at.

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