Error code
Thermador dishwasher error code E6900
Thermador error code E6900: the board cannot open the detergent flap. 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
What we can confirm
Code E6900, 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.
What it narrows down to
Detergent dispenser
What you are probably seeing
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.
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Often the water, not the machine Dishwasher not cleaning properly
Grit left on plates, a film on glasses, or detergent still sitting in the cup at the end. On hard water most of this is chemistry and loading before it is ever a part.
- Grit or food left on the lower rack
- A cloudy film on glassware
- Detergent still in the dispenser afterwards
In more detail
About Thermador dishwasher error code E6900
What this one means
The board cannot open the detergent flap. 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 dispenser solenoid
- Its wiring
- A flap fouled by set detergent
What to try yourself
- Open the dispenser by hand and clean out any caked detergent around the hinge
Then what
Dishes coming out with detergent still in the cup is the same problem seen from the front.
This code is published for dishwashers. 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