Asko dishwasher: field service manual

Covers: Asko 24 in built-in dishwashers sold in the US with F-code displays. Code meanings below are for the common F1-F7 set; newer generations may use different formats. Check the model's own code list.

Single sourceBrands: Asko7 components

A premium Scandinavian build with a stainless tub, a heating element under the tub, a main circulation pump, a separate drain pump, a three-stage filter (coarse, fine, micro-mesh), a float switch for overfill and a base-pan float for floods. Water temperature is the classic Asko call: F1 often turns out to be lukewarm supply water, not a failed heater.

Safety first

Power off at the breaker before removing the toe kick or reaching the element terminals.
Water off before disconnecting the inlet hose.

How it works

Fill: the inlet valve (with a mesh screen at the hose connection) fills to level. On level-controlled models a slow or failed fill sets F4.

Overfill protection: a float in the tub opens a switch at high level (F2). A float in the base pan detects leaks.

Wash: the circulation pump feeds the spray arms through the three-stage filter.

Heat: the element under the tub heats the water while a thermistor reports temperature. If the target is not reached within about 60 minutes, the control sets F1. A thermistor fault sets F3.

Drain: the drain pump empties the tub through the hose to the sink waste or disposer. A restriction sets the drain code (F7 on the common code set).

Dry: residual heat plus a drying fan on many models; rinse aid matters on a stainless tub.

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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