Error code
Bosch error code E:30/-20
Bosch error code E:30/-20: there is more detergent in the machine than it can handle. 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 E:30/-20, 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.
The code
E:30/-20
There is more detergent in the machine than it can handle
or call (305) 783-3552
What it narrows down to
Too much detergent
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.
-
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 E:30/-20
What this one means
There is more detergent in the machine than it can handle. 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:
- A soap bubbles icon is shown — how a model with no digital display says it. On that machine, the lights are the code
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:
- Overdosing
- Extra water added by hand
- The solenoid valve, if neither of those applies
What to try yourself
- Reduce the detergent noticeably on the next wash — a compact drum needs a fraction of what the bottle suggests
- Do not add water to the machine while it is running
Then what
Foam confuses the machine's level sensing, so it cannot confirm what it has done. It is one of the few codes with a fix that costs nothing and changes a habit.
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