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Quick answer
The timing and location of a Miele dishwasher noise are more useful than the word ‘loud.’ A knock in the wash cabinet can come from a spray arm touching a dish, while rattling can come from loose dishware or a foreign object in the drain pump. Pause safely, identify the stage, and arrange service for a new grinding sound, damaged part, leak, or noise that remains after the accessible checks.
Before you begin
Safety first
- Disconnect power before drain cleaning; do not reach into a moving spray arm or pump, and do not handle suspected glass without protection.
Work through in order
Diagnostic checks
Use only checks that match the exact appliance or system and its official guide.
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Check 1
Note whether the sound is a knock, rattle, grinding, or water-line knock and whether it occurs during filling, washing, or draining.
Expected result: The noise follows the wash cabinet, occurs only during draining, or is heard in the water pipe.
Next step: Use the matching check rather than replacing a part from the sound alone.
Why this matters
Why: Stage and location separate dishware/spray-arm issues from drain-pump or installation clues.
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Check 2
If the sound occurs during washing, pause only as the model instructions allow, then check that dishes are stable and no item blocks a spray arm.
Expected result: A dish moves, touches another item, or blocks the spray arm, or the load is secure.
Next step: Rearrange the accessible load and monitor one cycle. Do not reach into moving parts.
Why this matters
Why: Miele identifies unsecured dishware and a spray arm striking an item as wash-cabinet noise causes.
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Check 3
If the noise is during draining, switch off and disconnect power before checking the accessible filter, pump cover, and drain area for foreign objects.
Expected result: Debris is present, the impeller has unusual resistance, or the area is clear.
Next step: Remove only accessible debris with care, reseat the cover, and test once. Stop for any damage or hidden glass.
Why this matters
Why: Miele says foreign objects such as pits or glass can block the drain pump; a clear area shifts the fault toward service.
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Check 4
If the sound comes from the water line rather than the cabinet, note whether washing and draining otherwise work normally and do not alter plumbing yourself.
Expected result: The dishwasher functions normally despite a pipe knock, or the noise accompanies poor filling/draining.
Next step: Use a qualified plumber for installation noise and Miele service for appliance performance faults.
Why this matters
Why: Miele manuals describe some water-pipe noise as installation-related; accompanying performance problems need a separate intake or drain diagnosis.
Use your observations
Decision map
Find the observation that best matches what you see, then follow the next safe action.
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PATH 01Next step
What you see
A knock stops after a dish or spray arm obstruction is corrected
Do this next
Keep rotating spray arms clear and load dishes securely.
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PATH 02Next step
What you see
A rattle or grinding sound occurs only during draining and debris is found
Do this next
Use the power-off accessible cleaning procedure and call service if the sound remains.
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PATH 03Next step
What you see
The noise persists with a clear load and drain area, or is accompanied by a leak or poor operation
Do this next
Stop the dishwasher and book service; do not run it to ‘test’ a damaged sound repeatedly.
Helpful context
Understand the symptom
Separate load noise from pump noise
A sound that follows the spray arm or appears only during draining points to different checks. Do not open the door into hot water or reach into a powered pump area.
When checks do not resolve it
Need a professional?
Use service for internal moving parts, electrical components, or persistent unexplained noise.
Safety scope: Disconnect power before drain cleaning; do not reach into a moving spray arm or pump, and do not handle suspected glass without protection.
Have this ready
- Provide the sound type, location, program stage, whether a load rearrangement changed it, and whether water drains normally.
Common questions
FAQ
Is every Miele dishwasher noise a failure?
No. Miele identifies loose dishes, spray-arm contact, foreign objects, and some water-line installation sounds as distinct possibilities. Timing and location decide the next check.
What should I do about grinding during drain?
Stop the dishwasher, disconnect power, and check only the documented accessible drain area for foreign objects. Arrange service if the sound remains or the area is damaged.
Read the exact guide
Official sources
- Water intake indicator light flashingMiele USA Support · Miele dishwashers with a filling or inlet symptom
- Unusual noises during drainingMiele USA Support · Miele dishwashers making noise while draining
- Rattling/knocking noise in wash cabinetMiele USA Support · Miele dishwashers with rattling or knocking in the wash cabinet
- DrainageMiele USA Support · Miele dishwashers with a drainage or pump symptom
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