La Cornue Range Top Er
La Cornue Range Top Er 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 Er means on your La Cornue Range Top
On a La Cornue induction range-top module, “Er” (sometimes with a number) flags an internal technical fault the control cannot resolve. The zone or module stops and the code remains until serviced.
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.
- “Er” shown and the module stops heating
- Controls unresponsive or erratic
- May follow a power event
- Returns after a reset
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.
- Control board fault — failed component or invalid value
- Zone sensor fault — sensor open/short
- Wiring fault — loose/damaged connection
- Power event — surge/brownout
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.
- Power off two minutes, retry once.
- Record any digits after “Er”.
- Confirm a stable supply.
- If it returns immediately, stop and arrange service.
When to call a technician
A persistent “Er” needs a technician to read the fault and replace the correct proprietary control board if required. 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 induction control board, zone sensors, and wiring. 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 Range Top, 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. When you book service, having the model and serial plate details and a note of exactly what you observed will help the visit go quickly. A clear description of when the problem started and what you were cooking at the time often points the technician straight to the cause. Because every La Cornue range is built to order, repairs are matched to your specific configuration, finish, and fuel type rather than a one-size-fits-all part. Keep any displayed code visible or photographed for the technician; resetting the appliance can clear useful diagnostic information.
Need help now? Book a certified technician on our schedule page, explore more La Cornue range top error codes, or see full La Cornue range top repair options.
