Melitta states that an unusually loud grinder noise can mean a foreign object is trapped in the grinder. Stop the preparation, switch off and contact Melitta service. Do not run another dose and do not insert a tool between the burrs. The guide intentionally ends at service because opening or probing the grinder can damage it and create an injury risk. This exact symptom does not by itself prove that an internal replaceable part has failed. Finish the automatic shutdown, unplug and let hot or pressurised parts cool. Keep water out of the bean hopper, grinder and electrical openings.
Models covered
Safety first
- Finish the automatic shutdown, unplug and let hot or pressurised parts cool. Keep water out of the bean hopper, grinder and electrical openings.
What the symptom may indicate
Checks in the right order
- Confirm the exact state
Melitta states that an unusually loud grinder noise can mean a foreign object is trapped in the grinder.
- Apply the manufacturer check
Stop the preparation, switch off and contact Melitta service. Do not run another dose and do not insert a tool between the burrs.
- Use the result
The guide intentionally ends at service because opening or probing the grinder can damage it and create an injury risk.
Stop and get qualified help when
- Stop for a harsh grinder noise, uncontrolled leak, burning smell, electrical error or a symptom that returns after the single documented retest.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 3 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Melitta — Melitta's official support material documents “Melitta Passione OT grinder makes a loud unusual noise” and the bounded user checks retained here.
Last checked: 30 August 2026