---
title: "Induction hob repair cost"
description: "La Cornue induction hob repair cost — the most instrumented job on this site, and the only one with codes to read: E2, U400 and Er with a number."
url: "https://la-cornuemiami.support/repair-cost/induction-hob-repair-cost/"
date_modified: "2026-09-03"
Appliance type: "Cooktops and rangetops, Ranges"
---


# La Cornue induction hob repair cost

### Indicators are not codes, and this display has more of the first

The hob shows the pan-missing symbol, H for residual heat, A for automatic heat-up, L for child lock, L1 and L2 for the simmer settings and P for boost. None of those is a problem. Exactly three things on that display are — E2, U400 and Er — and a good share of industry-wide calls about dead cooktops are an L somebody’s child switched on. Reading the display properly is free, it is the first thing we do, and it is occasionally the whole visit.

What moves this figure

from $325, and ventilation is investigated before electronics

Every zone tested with a pan meeting its minimum diameter

An Er number is quoted with the board's lead time up front

Which code, and when

E2 under load, E2 from cold and a latched U400 are three different conversations.

Whether it is the installation

The maker's own first suggestion for E2 is ventilation, and it is often the answer.

Coil, sensor or board

Three parts behind one dead zone, separated with a meter rather than by substitution.

How many zones

One dead zone is local. All of them is supply, connection or the generator.

Board lead time

A control for a hand-built appliance can ship from France, and that is said before the order.

Indicators are not codes, and this display has more of the first

The hob shows the pan-missing symbol, H for residual heat, A for automatic heat-up, L for child lock, L1 and L2 for the simmer settings and P for boost. None of those is a problem. Exactly three things on that display are — E2, U400 and Er — and a good share of industry-wide calls about dead cooktops are an L somebody’s child switched on. Reading the display properly is free, it is the first thing we do, and it is occasionally the whole visit.

### Can you not just reset it?

We can, and on E2 we will not leave it at that. E2 is a protection: the electronics reached their limit and shut down to survive. Clearing it and handing the range back means the next person to see it is quoting for a generator board. If the cause is the air path we say what it is and what it should be; if the installation is genuinely correct and it still trips, that is a part and we say that with the measurements.

### Is a dead zone always the coil?

No, and this is where measurement earns its money. A dead zone can be the coil, its temperature sensor, or one channel of the generator, and all three look identical from above. It can also be the pan — a base below the minimum diameter for that zone will not couple at all, which is why the visit starts with a proper pan and a tape measure.

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