F05
What code F05 means on a Bosch washing machines, what causes it, and which part to check first.
● SEVERITY: HIGH
Bosch F05 means: AquaStop / anti-flood fault. The documented cause is: Water in the machine base triggering the AquaStop float. Internal leak source.
What F05 means
AquaStop / anti-flood fault
The display shows F05 and the machine stops until the fault is cleared.
What the technical documentation says
Causes documented in the technical source published by whitegoodshelp.co.uk
| DOCUMENTED CAUSE OR CHECK |
|---|
| Water in the machine base triggering the AquaStop float |
| Internal leak source |
Replacement parts
Tools you'll need
Before you open anything
Unplug the machine and close the water tap before removing any panel. Water and mains electricity sit centimetres apart inside a washing machine. If the drum still holds water, drain it from the filter first — it can be scalding.
What to check, in order
From the quickest check to the one that needs a technician.
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Frequently asked questions
What does F05 mean on a Bosch?
AquaStop / anti-flood fault The documented cause is: Water in the machine base triggering the AquaStop float. Internal leak source.
Can I fix F05 myself?
It depends on the part involved: Water in the machine base triggering the AquaStop float. Internal leak source. Clearing a filter or straightening a hose is within reach of anyone; anything behind a panel means mains electricity and water together — that is a job for a technician.
Does Bosch use other codes on this appliance?
Yes: we document 20 other codes for Bosch on this washing machines. They are listed at the bottom of this page, each with its own meaning.
Does the same code mean the same thing on other brands?
Often not. The same two characters can point to completely different faults depending on the manufacturer — always check the page for your own brand.