La Cornue Cooktop H
La Cornue Cooktop H is a fault our factory-trained technicians diagnose and repair with genuine parts. Below is what it means, the most likely causes, and the steps to try before booking service.
What Residual Heat "H" means on your La Cornue Cooktop
The “H” indicator on a La Cornue induction cooktop is a residual-heat warning, not a fault. After cooking, the glass over a zone stays hot from the cookware, and “H” reminds you not to touch it. It clears on its own as the zone cools. A stuck “H” can, however, point to a sensor issue.
Symptoms to look for
The signs below help confirm you are dealing with this condition rather than a different fault. You may notice just one of them or several together, and they can appear gradually over time or suddenly after a spill, a power event, or recent service.
- “H” shown on a zone after cooking
- Indicator clears as the glass cools
- Appears even though induction heats the pan, not the glass directly
- Stays on far longer than the glass stays warm (possible fault)
Common causes
Several different faults can produce these symptoms. Working through the most likely causes in order helps you separate a quick, inexpensive fix from a problem that needs trained service and the correct La Cornue parts.
- Normal residual heat — glass warmed by the cookware (expected behavior)
- Warm environment — slow cooling in a hot kitchen
- Stuck indicator — a zone sensor reads hot when it is not (fault)
- Sensor drift — temperature sensor out of calibration
Troubleshooting steps you can try
Work through these checks in order, with the appliance cool and powered down before you touch any internal part. Stop at any point where you are unsure, or where gas, high heat, or live electrical parts are involved, and hand the remaining diagnosis to a qualified technician.
- Treat any zone showing “H” as hot and avoid touching it.
- Wait for the glass to cool; the indicator should clear by itself.
- Note if “H” stays on long after the glass is cool — that suggests a sensor fault.
- Keep the glass clean so the sensor reads accurately.
When to call a technician
A persistent “H” on a cool zone indicates a temperature-sensor fault that a technician should check. Normal residual-heat “H” requires no service — it is a safety feature. You can reach the La Cornue National Service Center on 1-877-522-6768, or find an authorized technician through the manufacturer at lacornueusa.com. La Cornue appliances are hand-built and use proprietary parts, so factory-trained service protects both your warranty and the appliance.
Parts a technician may replace
Depending on what the diagnosis shows, a technician may inspect, test, or replace the residual heat indicator, ceramic glass, and zone sensor. The correct part for your configuration is identified from the model and serial number; on La Cornue appliances these are proprietary components fitted by trained service rather than generic substitutes, which protects both performance and the appliance’s long-term value.
Safety and prevention
To reduce the chance of this returning on your La Cornue Cooktop, keep up with routine care — clean spills before they bake on, follow the manufacturer’s maintenance schedule, and avoid abrasive pads or harsh chemicals on enamel, brass, and finished surfaces. Protect the electronics with a stable, correctly rated supply, and note any code exactly as displayed before resetting.
Need help now? Book a certified technician on our schedule page, explore more La Cornue cooktop error codes, or see full La Cornue cooktop repair options.
