Beko / Blomberg dishwasher: field service manual

Covers: Beko (e.g. DDT, DUT families) and Blomberg (e.g. DWT family) 24 in built-in dishwashers sold in the US. Beko and Blomberg share an owner group and many parts; some drain pumps are listed for both brands.

Single sourceBrands: Beko, Blomberg5 components

A European-style tall-tub design with a single wash pump feeding both spray arms through a removable filter stack, a separate drain pump and one drain route. The most reported call is water left in the tub at the end of the cycle, usually from the filter stack over the pump inlet or the drain path. Code meanings differ between sources and model generations, so treat codes as pointers and confirm on the model's literature.

Safety first

Cut power and dry the base tray before inspecting: water and electrical parts share the base.

How it works

Fill through the inlet valve; wash by one circulation pump to both arms through the filter stack; drain by a separate drain pump.

Drain diagnosis by ear: a pump that is moving water changes note as the sump empties. A tone that never changes through the drain phase points to a restriction (filter, hose, disposer knockout).

The base tray holds the electrical section as well as any leaked water. Cut power and dry the tray before inspecting.

Components & tests

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OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Large stainless refrigerator set flush between kitchen cabinets by Alex Qian, Pexels License

Diagnostic guides for this appliance

Component test · Dishwasher

How to test a dishwasher heating element

Many US dishwashers have a hidden or visible loop element under the tub. A good one reads in the tens of ohms. A leak to the tub trips the GFCI even when the resistance looks fine, so always check to ground.

5 steps ~20 mineasy

Component test · Dishwasher

How to test a dishwasher circulation (wash) pump motor

The wash motor pushes water to the spray arms. Older units use an AC induction motor; many newer ones use a brushless DC motor driven by the board. Rule out a jam and a filter clog before testing, and use the tech sheet for winding values.

6 steps ~45 minmoderate

Component test · Dishwasher

How to test a float switch (dishwasher overfill and similar)

A float rides up with water and opens or closes a small switch under the tub. It stops overfill or flags a leak. Make sure the float moves freely before blaming the switch.

6 steps ~20 mineasy

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