La Cornue Range Board Fault
La Cornue Range Board Fault 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 Control Board Fault (Dual-Fuel) means on your La Cornue Range
Dual-fuel La Cornue ranges pair gas burners with an electric oven managed by an electronic control. A control board fault is an indicator that the board has failed or is misbehaving — sometimes shown as an “Er” code, sometimes as erratic oven behavior without a clear code.
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.
- Electric oven behaves erratically or will not start
- Unresponsive or flickering controls
- Possible “Er” code alongside the symptoms
- Gas burners may still work normally
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.
- Board component failure — a relay or driver on the board fails
- Power event — surge/brownout damaged the control
- Sensor/harness fault — invalid inputs confuse the board
- Connection issue — loose board connectors
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 the range off at the breaker for several minutes, then retry once.
- Note any code shown for the technician.
- Confirm a stable supply and outage history.
- Use the gas burners normally while awaiting service if they are unaffected.
When to call a technician
A recurring control fault requires a technician to diagnose and replace the correct proprietary board. Board-level work on dual-fuel ranges should be done by factory-trained service. 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 control board, relays, 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, 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. Periodic professional servicing catches wear items early, and addressing small performance changes promptly usually means a simpler repair. 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.
Need help now? Book a certified technician on our schedule page, explore more La Cornue range error codes, or see full La Cornue range repair options.
