Written by
Annika Berglund Appliance Care EditorPublished October 29, 2026
VERIFIED
Error codeF40
ApplianceDishwasher
Reading F40
F40 is the manual wording for inlet valve leakage, and it is listed for the DBI664 XXL and the DBI564 series. The valve in question is the one that lets water into the dishwasher.
What the owner can do
Turn off the water supply valve.
Arrange a technician visit, since no other owner step is printed.
F54: overfilling (water 2), where the water supply is also shut off
Dishwasher service in the Bay Area
For Asko dishwasher service in San Francisco, call (415) 993-3547 once the supply valve is closed. A technician will want the F40 message, the model number and a note of what you did. The Asko dishwasher repair page has the general overview.
Model compatibility: Asko reuses codes across series and model years, so F40 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
F40 is the inlet valve leakage message on Asko DBI664 XXL and DBI564 series dishwashers.
Important safety warning. Do not attempt repairs involving electrical components, water lines, sealed cooling systems or anything behind a panel. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Asko appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Asko appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
