Error code
Bosch error code E33
Bosch error code E33: the machine has detected excessive foam. What the code covers, what to check first, and what it does not tell you — on washers.
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What we can confirm
Code E33, from the manufacturer's own pages
A code is only meaningful together with the generation showing it — the same two digits mean different things across generations.
What it narrows down to
Foam detected
What you are probably seeing
Diagnostic
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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.
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There is a filter you can open Washer not draining
A cycle that stops with water in the drum, or clothes left soaking because the machine never got to the spin. There is a pump filter behind a flap at the front of these machines, and almost nobody knows it is there.
- Cycle stops with water in the drum
- Will not spin because it has not drained
- A code beginning E:30 or E:36
In more detail
About Bosch error code E33
What this one means
The machine has detected excessive foam. 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.
The other ways your machine may say it
The same condition is published under more than one label, because it has been carried across generations of this appliance:
- E33, F33 — the same condition, on machines of different ages
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:
- Too much detergent
- Detergent past its life
- Detergent meant for a full-size machine
What to try yourself
- Reduce the dose, particularly on lightly soiled loads
- Read the dose on the packaging rather than filling the compartment
Then what
Slightly different from the overdose code: this one is the machine seeing foam in the drum rather than losing track of its water level. Same habit behind both.
This code is published for washers. The full list of 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