---
title: "Wolf induction cooktop error code E20"
description: "Wolf induction cooktop error code E20: wolf error code E20: a temperature sensor is reading a value the control knows cannot be true, on an induction…"
url: "https://wolfmiami.support/error-codes/error-code-e20-induction-cooktop/"
date_modified: "2026-08-20"
Product line: "Counter modules"
---


# Wolf induction cooktop error code E20

### What this one means

A temperature sensor is reading a value the control knows cannot be true, on an induction cooktop, where the generator under each zone is a power supply in its own right and reports for itself. It is a code the manufacturer publishes for this appliance, not one we have worked out — and it is decoded here rather than left as three characters on a display.

### What the code covers

A published cause names a circuit rather than a component, which is the single most useful thing to know before ordering a part. This one covers:

- The sensor and its wiring back to the board
- The plug where that wiring passes through the cavity wall
- The board's own measuring circuit, which is what an implausible reading is checked against
- HOT LED does not reflect commanded state HOT not lit – RTD steam fill is > 140°F
- HOT lit – RTD steam fill is < 122°F
- GM15: HOT not lit after cooking > 5 minutes
- GM15: HOT lit after off for > 30 minutes

### Worth doing before you call

- Note whether one zone is affected or all of them — each has its own generator
- Note whether the oven heats at all, and whether it overshoots or never gets there

### Then what

An open sensor and a shorted one are opposite readings of the same circuit, and the appliance says which. That is the measurement a technician would otherwise start by taking.

This code is published for cooktops & rangetops. The [full list of codes](https://wolfmiami.support/error-codes/) has the rest of them, searchable, including the labels older and newer machines use for the same conditions.

Cooktops & rangetops

What this code means

What this one means

A temperature sensor is reading a value the control knows cannot be true, on an induction cooktop, where the generator under each zone is a power supply in its own right and reports for itself. It is a code the manufacturer publishes for this appliance, not one we have worked out — and it is decoded here rather than left as three characters on a display.

What the code covers

A published cause names a circuit rather than a component, which is the single most useful thing to know before ordering a part. This one covers:

The sensor and its wiring back to the board

The plug where that wiring passes through the cavity wall

The board's own measuring circuit, which is what an implausible reading is checked against

HOT LED does not reflect commanded state HOT not lit – RTD steam fill is > 140°F

HOT lit – RTD steam fill is < 122°F

GM15: HOT not lit after cooking > 5 minutes

GM15: HOT lit after off for > 30 minutes

Worth doing before you call

Note whether one zone is affected or all of them — each has its own generator

Note whether the oven heats at all, and whether it overshoots or never gets there

Then what

An open sensor and a shorted one are opposite readings of the same circuit, and the appliance says which. That is the measurement a technician would otherwise start by taking.

This code is published for cooktops & rangetops. The full list of codes has the rest of them, searchable, including the labels older and newer machines use for the same conditions.

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