On Purista and Latticia OT, the descaling symbol clears only after the complete model-specific programme, including its rinse phase, has finished. A normal coffee rinse is not the final descaling rinse. Keep the machine in the requested programme, refill when instructed and allow every automatic pause to finish. If power was interrupted, resume using the instructions for the exact model rather than repeating a second dose of descaler. [object Object]
Models covered
- Melitta Purista F230-101 · F230-101
- Melitta Purista and Avanza F230-103 · F230-103
- Melitta Latticia OT F300-100 · F300-100
- Melitta Latticia OT F300-101 · F300-101
Safety first
- Keep water out of the bean hopper, grinder and electrical openings. Never force a brew unit, valve, grinder control or hot steam part.
What the symptom may indicate
Checks in the right order
- Confirm the model and signal
Confirm that the displayed or observed condition exactly matches “descaling symbol does not switch off” before changing anything.
- Prepare the appliance safely
Complete the normal shutdown, unplug the machine, let hot parts cool and empty the drip tray before removing user-accessible parts.
- Carry out the official user check
Prepare the approved descaling solution to the 0.5-litre mark, restart the complete descaling programme and do not interrupt its final rinse.
- Interpret one controlled retest
Reassemble every part in its documented position and run one short rinse or one beverage. A repeated signal after the stated check requires service rather than repeated resets.
Stop and get qualified help when
- Stop and contact the manufacturer if the same signal returns after one correct cycle, a grinder contains a foreign object, a hot-water leak appears or the machine trips power.
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 4 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 — The official Melitta page documents this model-family symptom and the user-level procedure above.
- Melitta — The official Melitta page documents this model-family symptom and the user-level procedure above.
Last checked: 30 August 2026