Thermador Dishwasher E9210 Flags a Bottom Spray Arm That Will Not Turn

What E9210 means

You will find this code in the owner manual, though not on Thermador's website. The control concluded that the lower spray arm is not rotating properly. The manual offers three explanations in descending likelihood: dishes jamming the arm, the arm not clipped on correctly after cleaning, and filters so clogged that the arm gets little water.

Usual causes of E9210

A long utensil or tall item sliding through the lower rack into the arm's path
A lower arm that was not seated properly after cleaning
Filters dirty enough to starve the arm of water
Spray nozzles on the arm that have clogged

✓ A safe check worth trying

1. Turn the machine off and slide out the lower rack. 2. Turn the lower spray arm by hand; it ought to rotate smoothly all the way around. 3. If it snags, look for a handle or platter that slipped down through the rack. 4. After recent cleaning, press and twist the arm until it locks, then check the filters.

! Why you should stop here

When the arm spins freely, the filters are clean and the number stays, the circulation pump or the arm's bearing is the likelier source.
Working around the issue leaves the bottom rack coming out dirty on every load.

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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E9210E9210 questions

Why can't I find E9210 on the Thermador site?

The list posted online does not cover every number the control can display. This one appears in the owner manual packed with current machines. We keep the explanation in plain language.

Which dishes suffer most?

Those in the bottom rack, because that arm is the subject of the code. Pots and plates come out worst, while glasses above may look acceptable.

Could tiny nozzle holes be the cause?

They can. Debris clogs those holes, so we examine them along with the arm's seating and the filters before turning to the circulation pump. Questions are welcome at any point during the visit.