Thermador Dishwasher E6900: the Detergent Dispenser Solenoid

What E6900 means

After a wash the detergent is still sitting in its compartment, and E6900 is displayed. Thermador documents this number as an error in the dispenser solenoid circuit. That solenoid releases the detergent at the proper moment in the cycle, and when the board tried it, the circuit did not answer. The cycle may still run, but without detergent the load will not come out properly clean.

Usual causes of E6900

A dispenser solenoid that has burned out

✓ A safe check worth trying

1. Turn off the dishwasher's breaker. 2. Wait thirty seconds, then restore power. 3. Make sure the dispenser door is not stuck shut with dried detergent or pressed by a dish. 4. Run a short cycle and see whether the dispenser opens and the code stays away. If not, call us.

! Why you should stop here

The solenoid hides behind the door panel, so reaching it means dismantling the door.
A dispenser that never opens leaves loads washed without detergent, so repeating cycles wastes water and time.

Taking off a panel yourself does not by default void a manufacturer warranty, yet it can lead to accidental damage, and some manufacturers attach their own service terms. Read your warranty paperwork, or ask us, before you decide.

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E6900E6900 questions

Why are my dishes dirty with detergent left in the cup?

That is the classic sign. If the solenoid cannot open the dispenser, soap never reaches the wash, so loads come out unclean while the compartment stays full.

Can I drop a tablet into the tub as a workaround?

A tablet placed in the tub gives you a wash for the moment. It does not repair the solenoid, so the code will still appear.

Is the door panel hard to open?

It takes care, since the door holds wiring and the dispenser mechanism. We handle the dismantling and refit it, and the repair carries our 30-day workmanship warranty.