Er:17
What code Er:17 means on a Bosch washing machines, what causes it, and which part to check first.
● SEVERITY: HIGH
Bosch Er:17 means: Aquastop error. The documented cause is: The Aquastop float switch in the base of the washer cabinet trips if water leaks into the base of the washer cabinet. Unplug the washer and check for water in the base of the cabinet.
What Er:17 means
Aquastop error
The display shows Er:17 and the machine stops until the fault is cleared.
What the technical documentation says
Causes documented in the technical source published by applianceaid.com
| DOCUMENTED CAUSE OR CHECK |
|---|
| The Aquastop float switch in the base of the washer cabinet trips if water leaks into the base of the washer cabinet |
| Unplug the washer and check for water in the base of the cabinet |
| If water is present, repair the source of the leaking |
| If the base of the cabinet is dry, check for a foreign object stuck under the float switch |
| If the Aquastop float switch is defective, replace it |
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 Er:17 mean on a Bosch?
Aquastop error The documented cause is: The Aquastop float switch in the base of the washer cabinet trips if water leaks into the base of the washer cabinet. Unplug the washer and check for water in the base of the cabinet. If water is present, repair the source of the leaking. If the base of the cabinet is dry, check for a foreign object stuck under the float switch. If the Aquastop float switch is defective, replace it
Can I fix Er:17 myself?
It depends on the part involved: The Aquastop float switch in the base of the washer cabinet trips if water leaks into the base of the washer cabinet. Unplug the washer and check for water in the base of the cabinet. If water is present, repair the source of the leaking. If the base of the cabinet is dry, check for a foreign object stuck under the float switch. If the Aquastop float switch is defective, replace it 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.

