Bosch Dishwasher E18 Error — Water Inlet

What Does This Error Mean?

E18 on a Bosch dishwasher means water flow was detected when the inlet valve should be closed — likely a leaking inlet valve, a leak inside the dishwasher, or the Aquastop hose has triggered. Turn off the water immediately and book service.

Affected Models

Bosch SHPM88Z75N
Bosch SHEM63W55N
Bosch SGV68U53UC
Bosch SHX9PCM5N
Bosch SMV68IX02E

Common Causes

Inlet valve failed in partially-open state, allowing water through when off
Internal leak at the sump or pump
Aquastop hose triggered by a leak inside the cabinet
Failed flow meter giving false flow readings

How to Fix It

Turn off the water at the tap.

Find the isolation valve under the sink and turn it fully clockwise to close. This stops any further water entering the dishwasher while you arrange repair.
Check the floor underneath.

Look at the kitchen floor in front of and beside the dishwasher. Any visible water means a leak has already started — clean it up and place towels under the dishwasher to catch any further drips.
Power off the dishwasher.

Switch off at the wall socket or trip the breaker. The dishwasher should be fully de-energised until the cause is found.
Pull out the dishwasher to check for leaks.

If you can safely pull the dishwasher forward, look at the underside and the rear for any drips. The Aquastop hose at the rear has a small flag or valve — if it is in the triggered position, the hose has detected a leak.
Book Bosch-authorised service.

E18 is not a routine code — it indicates water flow when none should be present. A technician will pressure-test the inlet valve, inspect the sump, and replace the failed component. Cost varies USD 200–500 depending on cause.

When to Call a Professional

E18 indicates water-on-when-off — a potential water damage risk. Turn off the water at the tap, then book service. Do not run another cycle until inspected.

Frequently Asked Questions

Is E18 a real leak or a false alarm?

Bosch designs Aquastop and the flow detection system to err on the safe side — false alarms do happen but should be assumed real until proven otherwise. The water-damage risk from ignoring a real E18 is very high (kitchen flood, ceiling collapse below).

Can I bypass E18 to finish a wash cycle?

No — and you should not try. E18 is a water-safety lockout. Continuing to use the dishwasher with E18 risks significant water damage to the kitchen. Always resolve before reuse.