---
title: "Oven error code C-21"
description: "Dacor oven error code C-21: The cavity has gone hotter than it should and the control has intervened."
url: "https://dacormiami.support/error-codes/oven-c-21/"
date_modified: "2026-09-12"
Appliance type: "oven, range"
---


# Oven error code C-21

### What C-21 means on this make

The cavity has gone hotter than it should and the control has intervened. Treat it the way you would the Classic platform’s F2: the appliance is protecting itself and the kitchen, and clearing it to see whether it happens again is the one response that can turn a repair into an incident. A relay holding an element on, or a sensor reading far too low so the control keeps calling for heat, are the two ordinary causes.

### Where this appears, and which table it belongs to

On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all.

### Which machines this one applies to

Modernist wall ovens and Pro ranges. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 5 of the appliance types this site publishes — coffee machine, cooktop, dishwasher, oven and range — and publishes none at all for freezer, microwave, range hood, refrigerator and wine cooler. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door.

### What to do about it

- Switch the appliance off at the breaker and leave it off until it has been seen.
- Do not clear and re-run. A stuck relay will heat the cavity again, and the door may lock.
- Note whether it followed a self-clean cycle — that is when marginal parts give up.
- The relay and the sensor are tested together, because either alone produces this.

### Where this goes next

The job this usually becomes is [oven not heating repair](/services/oven-not-heating-repair/), and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-6067](tel:+13053636067) and describe what the panel is doing before booking anything.

Modernist wall ovens and Pro ranges

What this one means

What C-21 means on this make

The cavity has gone hotter than it should and the control has intervened. Treat it the way you would the Classic platform’s F2: the appliance is protecting itself and the kitchen, and clearing it to see whether it happens again is the one response that can turn a repair into an incident. A relay holding an element on, or a sensor reading far too low so the control keeps calling for heat, are the two ordinary causes.

Where this appears, and which table it belongs to

On the appliance’s own display. Photograph it before you cut the power: a display that has been cleared has taken the evidence with it, and there is no way to ask the machine for it again. Then check the model, because this make changed hands in 2016 and the two generations share no code string. The same characters mean different things on a Classic ERC oven, an ER-series range and a Modernist induction cooktop, and a meaning read off the wrong table is worse than no meaning at all.

Which machines this one applies to

Modernist wall ovens and Pro ranges. The same number on a different appliance of this make is a different page and often a different repair, which is why this archive is organized by appliance rather than by number. This maker documents codes on 5 of the appliance types this site publishes — coffee machine, cooktop, dishwasher, oven and range — and publishes none at all for freezer, microwave, range hood, refrigerator and wine cooler. Those appliances have symptom pages here and no code pages, which is the honest answer rather than borrowing a table from the machine next door.

What to do about it

Switch the appliance off at the breaker and leave it off until it has been seen.

Do not clear and re-run. A stuck relay will heat the cavity again, and the door may lock.

Note whether it followed a self-clean cycle — that is when marginal parts give up.

The relay and the sensor are tested together, because either alone produces this.

Where this goes next

The job this usually becomes is oven not heating repair, and that page carries a starting figure and the reasons that move it. If it turns out to be nothing — and on this make a real share of these are modes, reminders and settings rather than problems — the visit ends there and you pay the diagnostic and nothing else, or call [(305) 363-6067](tel:+13053636067) and describe what the panel is doing before booking anything.

---

**[Read full article: Oven error code C-21](https://dacormiami.support/error-codes/oven-c-21/)**