---
title: "Thermador dishwasher error code E2120"
description: "Thermador dishwasher error code E2120: thermador error code E2120: the heater in the zeolite chamber is not answering."
url: "https://thermadormiami.support/error-codes/error-code-e2120-dishwasher/"
date_modified: "2026-08-18"
Appliance type: "Dishwashers"
---


# Thermador dishwasher error code E2120

Error code

# Thermador dishwasher error code E2120

Thermador error code E2120: the heater in the zeolite chamber is not answering. What the code covers, what to check first, and what it does not tell you — on dishwashers.

- **From $95**

							diagnostic, credited to the repair
- **59**

							cities and neighborhoods covered
- **OEM**

							parts available on order
- **In writing**

							the price, before anything is opened

## Book a diagnostic visit

Your model number and a line about what it is doing is enough to get started.

Your details stay private. No spam, ever.

What we can confirm

## Code E2120, from the manufacturer’s own documentation

A code is only meaningful together with the generation showing it — the same two digits mean different things across generations.

The code

E2120

The heater in the zeolite chamber is not answering

or call [(305) 846-7685](tel:+13058467685)

What it narrows down to

Crystal Dry heater

What you are probably seeing

[Dishwasher not drying](https://thermadormiami.support/symptoms/dishwasher-not-drying/)

Diagnostic

From $95, credited to the repair

What it looks like from the kitchen

## The symptom this code usually arrives with

A code names the subsystem; the symptom is what sent you to look at the display in the first place. That page says what it usually turns out to be, cheapest cause first.

- Dishwasher not drying
					Plastics coming out wet is how these machines are designed to behave. Glassware coming out wet is a different matter, and on this make the drying is a mineral chamber rather than a heating element.

														Plastics wet, glass and steel dry

														Everything wet, including glass

														Drying noticeably worse than it used to be

								[

				What it usually means

			](https://thermadormiami.support/symptoms/dishwasher-not-drying/)
Plastics coming out wet is how these machines are designed to behave. Glassware coming out wet is a different matter, and on this make the drying is a mineral chamber rather than a heating element.

- Plastics wet, glass and steel dry
- Everything wet, including glass
- Drying noticeably worse than it used to be
In more detail

## About Thermador dishwasher error code E2120

### What this one means

The heater in the zeolite chamber is not answering. 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 chamber heater
- Its wiring
- The board circuit behind it

### Then what

Crystal Dry is the reason these machines dry plastics at all: a mineral chamber that gives off heat as it takes on moisture. When it stops, the dishes come out wet and nothing else is wrong.

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

This article is based on:

- Official manufacturer documentation
- Internal repair procedures
- Technician repair history
- Company quality standards

## Tell us the model number and what it is doing.

---

**[Read full article: Thermador dishwasher error code E2120](https://thermadormiami.support/error-codes/error-code-e2120-dishwasher/)**