Appliance Spares
Quick answer: A gas cooktop that clicks but won’t light is almost always one of five things, in order of likelihood: a wet or food-glazed ignition tip (free fix, 30 seconds with a toothpick and a dry cloth), a cracked igniter electrode, a misaligned or blocked burner cap, a failed ignition control module, or a gas supply issue. Try the cleaning fix first — it solves most cases. If that fails, the electrode is your next suspect. Safety line: anything past the gas isolation tap is licensed-gasfitter territory in Australia under AS/NZS 5601. You can clean tips and swap surface parts. You cannot legally muck with gas lines, regulators or hardwired ignition wiring.
Need the part?
Not sure it is the same on your machine? See every part listed by model number.
Last updated September 2026
Stop. Read this before you do anything.
If you can smell gas — even faintly — turn off the isolation tap behind the cooktop, open a window, don’t touch any electrical switch, and ring your gasfitter. Smell-of-gas is never a situation.
If there’s no gas smell and the cooktop is just clicking without lighting, you’re in safe DIY territory for the surface-level fixes below. The rule in Australia is simple:
- Above the gas tap, surface side — burner caps, ignition tips, electrodes that unclip, burner heads: customer DIY is OK with care.
- Past the gas tap — gas hose, regulator, manifold, valves, hardwired ignition module mains side: licensed gasfitter only (AS/NZS 5601 Gas Installations). Don’t touch it. Don’t watch a YouTube clip and have a crack. It’s the one job where DIY is actually illegal, not just inadvisable.
Identify the fault — which burners click?
| What’s happening | Most likely cause |
|---|---|
| One burner clicks but won’t light, others work fine | Wet/dirty tip on that burner, OR cracked electrode on that burner |
| All burners click but none light | Gas supply (tap off, bottle empty, isolation valve), OR ignition module |
| No click at all on any burner | Ignition module dead, OR mains power to the cooktop |
| Clicks, lights briefly, goes out | Flame failure thermocouple/FFD issue — gasfitter job |
| Lights but flame is yellow/orange | Burner cap blocked or wrong burner cap fitted — not an ignition fault |
Pin down which burners fail and how — it cuts the diagnosis in half.
Cause 1: Wet or food-glazed ignition tip (the free fix)
The #1 cause on Smeg, Bosch, Westinghouse, Chef, Omega, Blanco and Ariston cooktops is a tiny ceramic electrode that’s gone wet or got a sugar/oil glaze on it. A pasta boil-over, a wipe-down with a wet cloth right before cooking, kettle steam from the burner next door — any of them can leave the tip too damp or dirty to throw a clean spark.
The fix (free, 30 seconds):
1. Turn the burner control off. Let it cool.
2. Lift off the burner cap (flat metal disc on top) and the burner head (ring with the gas ports).
3. Find the small ceramic electrode beside the burner base — looks like a tiny white spark plug with a metal point.
4. Clean it dry: a toothpick to chip off crusted food, then a dry cotton cloth. No water, no spray cleaner. If wet, leave it 10 minutes to dry — or hit it with a hair dryer on cool.
5. Clear the burner head ports with the toothpick too — blocked port near the electrode = no fuel where the spark is.
6. Refit cap and head dead flat. Try lighting.
If it fires, you’re done. No part needed. If one burner still won’t light after a thorough clean, move to Cause 2.
Cause 2: Cracked or worn igniter electrode
The ceramic electrode is a wear part. Years of heat cycling, pot-bottom whacks, kitchen-cleaner overspray seeping into the ceramic — all crack the insulator. Once it cracks, the spark jumps to chassis through the crack instead of arcing to the burner head: click, no flame.
Tell: tip is clean and dry but still no light. Hairline crack or black scorch on the ceramic body. In a dark kitchen, no visible spark at the tip.
The fix: Replace the electrode. Brand-specific — Smeg, Bosch, Westinghouse, Chef, Omega, Blanco and Ariston all use different formats. Run your cooktop model through the Part Finder — model in, exact-fit electrode out. Or browse:
- Browse cooktop parts — Smeg gas cooktop electrode.
- Browse cooktop parts — Westinghouse/Chef electrode .
- Browse cooktop parts — Bosch gas cooktop electrode.
Surface-side only: turn the gas isolation tap off before lifting any burner. The electrode unclips from its lead at the underside of the burner base — no gas-line work needed if you stay above cap-and-head level. Electrode mounted inside the gas valve assembly = gasfitter territory.
Cause 3: Blocked or misaligned burner cap
A cap that’s been knocked askew during cleaning, fitted upside-down, or has clogged ports underneath won’t deliver gas where the spark is — perfect click, no flame.
The fix: Lift cap and head off. Soak in warm soapy water 10-20 min. Brush — not wire. Clear every gas port with a toothpick (hold up to the light, daylight through every hole). Refit — cap and head only sit one way, locating notches align with pins. If it rocks when pressed, it’s not seated. Reseat.
Same fix when the flame is yellow/orange instead of blue — partial port blockage = partial combustion.
Cause 4: Failed ignition control module
Behind the cooktop body is the ignition control module — a small black box that converts 240V mains into the high-voltage pulses that fire each electrode. When it fails: all burners click weakly or not at all, OR clicking that won’t stop (relay stuck on, even with all knobs off).
Gasfitter line. The module is wired into the mains supply and the gas valve interlock. Replacing it is 240V mains work plus disturbing the gas-valve wiring. Not DIY in Australia.
What you can do: confirm “all burners, not one.” Confirm mains power is reaching the cooktop (timer panel still lit). Order the module if you’ve got a gasfitter quote and want to supply the part — run your model through the Part Finder.
Cause 5: Gas supply (boring but check it)
- LPG bottle: bottle empty? bottle tap fully open? Regulator tripped on a fast turn-on? Bottle off, wait 60 seconds, slowly back on.
- Natural gas: isolation tap behind the cooktop fully open (parallel to pipe = open). If the rest of the house gas works, supply is fine.
- Just installed? Air in the line — may need 5-10 click attempts to purge before first ignition. Still nothing? Get the installing gasfitter back.
Past the isolation tap = gasfitter only under AS/NZS 5601. Don’t tighten fittings, swap regulators or replace hoses yourself.
DIY vs licensed gasfitter
| Path | What you typically pay | Notes |
|---|---|---|
| Gasfitter callout + electrode + labour | $250-$500 typical AU metro | Fair if the fault is past the tap |
| Gasfitter callout + ignition module + labour | $400-$800 typical AU metro | Module + labour + leak-test certificate |
| DIY tip clean | Free | 30 seconds, no parts |
| DIY electrode swap (surface-side only) | Part only | Above the tap; isolation tap closed first |
The legal line in Australia is the gas isolation tap behind the cooktop. Above it (cap, head, surface electrode that unclips) is fine for a careful DIYer. Past it (gas hose, valve, regulator, manifold) is licensed-only under AS/NZS 5601 — and house insurance can be voided if a claim ever traces back to unlicensed gas work.
FAQs
My gas cooktop clicks but won’t light after I cleaned it — what did I do wrong?
Almost certainly water trapped on or near the electrode tip. Leave the cooktop apart 30-60 min to fully dry, or hit each electrode with a hair dryer on cool for 30 seconds. Reassemble cap and head dead flat. It’ll fire.
Can I clean the electrode with vinegar or oven cleaner?
No — both are conductive when wet and leave a residue that kills the spark. Dry toothpick, dry cloth. Nothing wet, nothing chemical.
One burner won’t ignite but lights fine when I hold a match to it — fault?
Confirmed electrode or lead fault on that burner. Gas and burner are fine (the match proves it). Replace the electrode for that burner.
All burners click constantly even when the knobs are off — dangerous?
Ignition module relay stuck on. Switch the cooktop off at the mains isolator to stop the clicking. Module needs replacing — gasfitter job. Not actively dangerous (gas valves stay closed without a knob turned) but it’ll burn the module out.
Why is anything past the gas tap illegal for DIY in Australia?
AS/NZS 5601 requires every gas connection to be leak-tested with a manometer by a licensed gasfitter, with a Compliance Certificate.
Related guides
- Induction cooktop error codes — electric-cooktop equivalents
- Westinghouse fridge repair — Australia — same-brand kitchen reference
- Bosch dishwasher E15 error — another kitchen-appliance diagnostic
- Find your appliance model number
Ready to fix it?
- Try the tip clean first — 30 seconds, free, solves most cases.
- Run your cooktop model through the Oz Appliance Spares Part Finder — model in, exact-fit electrode or module out.
- Above-the-tap DIY only. Anything past the isolation tap — licensed gasfitter.
- Order before 12pm AEST ships from our Sydney warehouse same day, Australia-wide.
Disclaimer: this article is general information only and is provided without warranty of any kind. Appliance designs vary between models and production runs — always follow the manufacturer’s instructions, switch off and unplug the appliance before starting any work, and confirm parts against the model number on your appliance’s model sticker. Any repair is undertaken at your own risk and Oz Appliance Spares accepts no liability for injury, loss or damage arising from work performed after reading this guide, to the maximum extent permitted by law. If in doubt, use a qualified technician.
