How to Clean La Cornue Burner Caps and Grates Without Damage

Turn every knob to off and let the cooktop cool completely. A CornuFe guide says to switch off the circuit breaker and let the range cool before a thorough cleaning. It also warns against cleaning or disassembling around a burner while another burner is on, because of the shock risk. Gather a soft cloth, a non-abrasive sponge, warm water and mild dish soap. The same guide rules out paint solvents, caustic and chlorine-bleach cleaners and coarse abrasives, and says never to mix cleaners.

Enamel grates can go in the dishwasher, according to the CornuFe guide. If you wash them by hand, use hot soapy water and a non-scratching sponge, and rinse and dry them. Heavy grease can be softened with a soak. Do not scrape enamel with metal tools, and avoid cleaners that strip the finish. Lift the grates rather than dragging them, since chips in the enamel are harder to fix than dirt.

Wash gas burner caps in warm soapy water and make sure all the holes around the cap are free of grease and debris. Blocked holes produce an uneven flame or prevent lighting. A CornuFe guide says blocked ports can be cleared with fuse wire. Use a gentle touch, and never widen the holes. Enamel burner heads can also go in the dishwasher on that guide’s instructions.

For solid-brass caps with burnt-on grease, the Chateau cleaning sheet describes soaking them in equal parts white distilled vinegar and water, boiling for 10 to 15 minutes, letting them cool before handling, then rinsing and drying. Brass is unlacquered and darkens naturally, so a dull cap after cleaning is a patina and not damage. Metal polish is the recommended way to brighten brass trim, and it should not be allowed to dry on the surface.

This is the step that decides whether the burner lights. The CornuFe guide says parts must be completely dry before they are replaced, and that burner heads must locate correctly in the base, with two pips fitting two notches. The Chateau cooking notes add that caps must be locked in position for the burner to ignite. Set each piece down level, rotate it gently to confirm it has seated, and check that nothing is tilted.

When everything is back, light each burner one at a time. Expect sparking at every burner when you press one knob, because that is normal on these ranges. A natural-gas flame should look bluish with at most a slight yellowish fringe, and a long white-tipped flame is a reason to call for service. If a burner clicks but does not light, the CornuFe checklist applies: look for debris in the sparker or burner holes, confirm the head is seated, and check that other gas appliances have gas.

While the grates are off, wipe the surface beneath them. Enamel is cleaned with mild soapy water on a microfiber cloth and dried promptly, and cleaner should be put on the cloth, never sprayed onto the enamel. A cast-iron plaque follows its own rules: a nickel-coated one is wiped with a damp soapy cloth, with a baking-soda paste for deep stains, while an older uncoated one takes no water at all and is wiped dry. Keep the ignition electrodes and the area around them clear of debris, since a blocked sparker is one of the first things the CornuFe checklist asks about.

Frequent light cleaning is easier than occasional heavy cleaning. A quick wipe after the surface has cooled stops sugary and fatty spills from baking on, which is what makes caps and grates hard to clean later.

If a burner still will not light after a careful clean and a correct reseat, or if you smell gas at any time, stop. For a gas smell, do not light anything or touch switches. Go outside and call the gas supplier. Anything beyond cleaning, such as adjusting the low-flame screw, belongs to trained service personnel.

Switch everything off and wait until the range is cool. Lift the grates and caps, wash them, clear the holes, rinse and dry. Wipe the surface, set each part back in its notches and confirm it is seated. Light each burner in turn and watch the flame. Doing this on a regular basis, and more often after heavy cooking, keeps ignition reliable and stops grease from collecting in the burner ports.

Can burner caps go in the dishwasher?

The CornuFe guide says enamel grates and heads can. For caps, the cleaning sheet describes hand washing in warm soapy water, so check your own manual.

Why will the burner not light after I cleaned it?

The usual reasons are a damp part, a cap or head that is not seated, or a blocked hole.

Is a dark brass cap damaged?

No. Unlacquered brass develops a patina.

Can I clean while the oven is on?

Wait until the range is cool. The guides ask for the range to be cooled and the breaker switched off before a thorough clean.

Need help now? Visit our services page or contact us.

Official manuals and support notes are available on La Cornue Support.