La Cornue Range Smells of Gas: What to Do First

If you smell gas now, do not read further inside the house. Leave the kitchen and the building, avoid light switches, appliances and anything that could spark, and call the gas utility or 911 from outside. Do not go back in until you have been told it is safe. The rest of this article is for afterwards, once the supply has been dealt with and you want to understand what happened.

The first minute

• Do not operate switches, plugs, garage door openers or phones inside the affected space.
• Get everyone, including pets, outside and upwind if you can.
• From outside, contact the gas utility or 911 and describe where the smell is strongest.
• Only if it is safe and you can reach it without delay, closing the gas shut-off valve to the range is a sensible step; do not linger to do it.
• Do not relight anything, run the hood, or try to air the room by switching on fans.

Is it really gas?

Natural gas and propane carry an added odorant that is sharp and unmistakable, often compared to rotten eggs or sulphur. Several other smells get mistaken for it. A warm, dusty scent the first time the oven runs after a long break is usually residue burning off. A sharp, slightly metallic smell after cleaning may be cleaner on a hot surface. A brief whiff right after a burner lights can be a little unburned gas dissipating. The rule is simple: if you are unsure, treat it as gas, because being wrong about a harmless smell takes up a few minutes, while being wrong about gas can be serious.

What commonly causes the smell

A burner left on without a flame

A knob nudged by a pan handle or a child can release gas with no flame to burn it. Modern flame safety devices are designed to prevent this, but an older or worn device may not hold as it should. If a burner runs without a flame, the safety system needs checking, not only the knob.

A burner that lights late

If the igniter is dirty, damp or weak, gas can flow for a moment before the flame catches and then ignite with a small pop. Repeated delayed lighting is a diagnostic sign. The checks for lighting faults are in La Cornue burner won’t light.

An oven that fails to ignite

A gas oven that tries to light, fails, and keeps feeding gas may smell strongly when you open the door. Ignition or flame sensing in the oven cavity is the usual suspect, and the oven should be left off until it has been examined. The related symptom is covered in La Cornue oven not heating.

A leak at a joint or connector

Gas joints can loosen over time, especially on a heavy range that has been moved for cleaning or flooring work, or in a home where the flexible connector was fitted during an old remodel. A leak at a fitting is not something to test with a flame. Technicians use proper detection methods and the right fittings for the supply.

Propane and converted supplies

Some hillside and wine-country properties run on propane, and some ranges have been converted from one fuel to another. A mismatch between orifices, regulator and fuel can cause unburned gas, yellow flames and odours. Ask whoever installed the range about the conversion history.

What not to do

Do not search for a leak with a flame. Do not tighten or loosen fittings yourself, do not use soap solutions as a substitute for professional leak detection, and do not switch the range back on to see whether the smell returns. Do not open range panels. If you smell burning or see sparks, switch off at the breaker as well, but only if you can do that without delay and without passing through the gas smell.

After the utility has made it safe

Once the supply is cleared, a technician should inspect the range before regular use. A visit begins with diagnosis, you get a written estimate, and nothing is repaired without your approval. The technician will usually check the shut-off valve, the connector and joints, burner valves, igniters and flame safety devices, and the oven ignition system. The full scope is on La Cornue range repair.

The model and serial plate is usually behind a lower door or drawer, or on the frame behind the oven door. Photograph it before the visit. It matters because fittings, orifices and safety components are matched to the exact range, including whether it was set up for natural gas or propane.

Prevent a repeat

Keep burner caps and heads seated and dry, so burners light cleanly. Wipe spills before they dry onto igniters. Know where the shut-off valve is, and make sure everyone in the household, including house managers and cleaners, can find it. If the range was installed years ago and never inspected, see La Cornue range installation checks for what is worth confirming. For the broader family of ranges, from the CornuFé 90 to the larger Château sizes, see La Cornue ranges.

Information to pass on

When you book, say where the smell was strongest, whether a burner or the oven was in use, and whether the range has ever been moved or converted.

Frequently asked questions