Miele Dishwasher F404 / F405 error
F404 / F405 is identified by Miele's official manual as water-inlet fault after repeated failed intake checks. Follow the exact model-scoped checks and safety boundary below.
Reference source listed as Miele official commercial dishwasher operating instructions PFD 402-407.
Open official source ↗water-inlet fault after repeated failed intake checks
Isolate the appliance when safe. Open the stopcock fully, switch the dishwasher off and back on, select the programme again, and press Start/Stop once. If the fault returns, contact Miele Customer Service. Do not open fixed panels or test live circuits.
Typical symptoms
Likely causes
Start with the least invasive explanation and stop if the check requires internal electrical or sealed-system access.
Safe next steps
- 1Record the complete F404 / F405 display and the full Miele dishwasher model
- 2Confirm that the displayed code matches the linked official Miele source
- 3Open the stopcock fully, switch the dishwasher off and back on, select the programme again, and press Start/Stop once. If the fault returns, contact Miele Customer Service.
- 4Stop and arrange model-specific service if F404 / F405 returns
Step-by-step repair
- 1Open the stopcock fully, switch the dishwasher off and back on, select the programme again, and press Start/Stop once. If the fault returns, contact Miele Customer Service. No internal component replacement is verified from F404 / F405 alone.
Repair details
The published checks normally need no replacement part. Internal repair cost is model- and region-specific; obtain a written Miele service quote after diagnosis.
External checks take about 5–30 minutes; professional diagnosis and repair time depend on the exact model.
Exact Miele model number and official manual, No internal electrical test tool is permitted
No replacement part is confirmed by F404 / F405 alone. Confirm the exact model, failed component, and manufacturer part number before ordering.
What not to do
- Do not open fixed panels, test live electrical or sealed-system parts, bypass safety devices, or order a component solely from F404 / F405.
Preventive maintenance
- 1Keep user-accessible filters, spray arms, seals, water connections, and the drain path maintained according to the exact model manual.
Frequently asked questions
What does F404 / F405 mean?
Miele identifies it as water-inlet fault after repeated failed intake checks.
Can I replace a part from the code alone?
No. Confirm the exact model and manufacturer diagnosis first.
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