Miele · Dishwasher error code

F78Circulation pump fault

Cross-checked High-voltage / caution

Unlock what this code means, its causes, tests and parts

Full library + AI assistant for $34.90, one time.

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.

Related diagnostic guides

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

Guide · Dishwasher

Dishwasher not cleaning well

Poor cleaning is usually low water temperature, a clogged filter, blocked spray-arm holes, or loading that blocks the arms. Check those before parts like the wash motor or heater.

4 steps ~30 mineasy