Replacing a La Cornue Induction Coil or
Replacing a La Cornue Induction Coil or is a common question among La Cornue owners. This guide walks through it step by step with technician-grade detail.
When a single La Cornue induction zone stops heating — even with a known-good pan — the culprit is usually that zone’s induction coil or its sensor. This guide explains the repair and why it needs a professional.
Confirm it is the coil/sensor first
The key test: place a pan that heats fine on other zones onto the dead zone. If it still won’t heat (often showing a flashing “U”) while other zones work normally, the fault is in that zone’s coil or sensor, not the cookware. See our “U” flashing guide for the full diagnostic. Rule out wiring faults (U400) and overheating (E2) first.
What the coil and sensor do
Each zone has an induction coil that generates the magnetic field that heats the pan, plus a temperature sensor that monitors the glass and electronics. A failed coil produces no heating; a failed sensor can cause faults, shutdowns, or erratic behavior.
The replacement process (overview)
- Power is disconnected at the breaker.
- The cooktop or rangetop module is opened to access the coils and electronics.
- The technician tests the coil and sensor to confirm which has failed.
- The correct genuine coil or sensor is installed — see our parts sourcing guide.
- The unit is reassembled, powered up, and each zone tested with a compatible pan.
Why this requires a technician
Induction modules contain high-voltage electronics and capacitors that can hold a dangerous charge even when unplugged. Diagnosing and replacing coils or sensors safely requires training and the right test equipment. This is not a DIY repair.
Cracked glass is different
If the issue is cracked glass rather than a dead zone, the glass is replaced as its own part — see our induction repair-or-replace guide. Keep the glass clean and scratch-free with our induction glass cleaning guide.
Repair, not replace
A single coil or sensor is a component-level repair, far cheaper than a new module or range, quoted “from $X.” See our repair cost guide.
Professional service
For induction coil or sensor replacement, schedule a technician. Specifications are on lacornueusa.com.
Rule out the cheaper explanations first
A dead zone is not automatically a coil failure. Before committing to a coil or sensor repair, confirm it is not cookware (try a known-good pan), a wiring fault (a U400 shuts the unit off after about a second), or an overheat (E2 clears once the unit cools). Only when a known-good pan still shows a flashing “U” on one zone while others work is the coil or sensor confirmed — our “U” flashing guide walks the test.
Why this is strictly technician work
Induction modules contain high-voltage electronics and capacitors that can hold a dangerous charge even after the unit is unplugged. Safely diagnosing which part failed — the coil that generates the field or the sensor that monitors temperature — requires training and test equipment, and the module must be opened to reach them. This is not a DIY repair. The upside is that it is component-level: replacing a single coil or sensor is far cheaper than a new module or range, quoted “from $X.”
Frequently asked
- Is cracked glass the same repair? No — cracked glass is replaced as its own part; see our induction repair-or-replace guide.
- Will other zones keep working meanwhile? Yes — a single-zone coil or sensor fault leaves the rest of the cooktop usable until repaired.
What the repair involves
The process runs in a set order: power is disconnected at the breaker, the cooktop or rangetop module is opened to reach the coils and electronics, the technician tests the coil and sensor to confirm which has failed, the correct genuine part is installed, and the unit is reassembled, powered up, and each zone tested with a compatible pan. Each zone has a coil that generates the heating field and a sensor that monitors temperature, so a failed coil produces no heat while a failed sensor can cause faults or erratic behavior. Because of the high-voltage electronics and charged capacitors, this is strictly technician work.
