E3
La Cornue
Supply Voltage Out of Range
Induction or electronic cooktop zone displays E3 and shuts off shortly after being turned on
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Incorrect line voltage (too high or too low), Miswired terminal block (missing phase or neutral), Loose supply connections, Faulty power supply section of control module
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker. Only a qualified person should test live voltages.
- Verify wiring: Remove the rear or bottom cover to access the terminal block. Confirm that L1, L2, and N (if used) are connected per La Cornue wiring diagram and that all screws are tight.
- Measure voltage: With a multimeter and appropriate safety precautions, verify that the supply voltage matches the rating on the appliance data plate (e.g., 208–240 V). Correct any supply issues via an electrician.
- Inspect for heat damage: Look for discoloration or melting at the terminal block or wiring. Replace damaged components.
- Module check: If supply is correct and E3 persists, the internal power supply on the induction or control module may be faulty and require replacement.
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Repair Difficulty
Hard
4/5
Required Part
Terminal Block Assembly
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