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Melitta Purista or Latticia OT: descaling symbol will not switch off

On Purista and Latticia OT, the descaling symbol clears only after the complete model-specific programme, including its rinse phase, has finished.

Manufacturer sources consulted

Models covered

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.

Before checking Melitta Coffee machine

  • Protect Melitta Purista or Latticia OT's electrical openings and grinder from water; a brew unit, valve or hot steam fitting that resists must not be forced.

What this symptom can mean on Melitta Coffee machine

What this exact symptom meansthe previous descaling cycle was interrupted, so the reminder remains until the complete programme and rinse are finished.
What to distinguish firstConfirm that the displayed or observed condition exactly matches “descaling symbol does not switch off” before changing anything.

4 checks for Melitta Coffee machine, starting with Confirm the model and signal

  1. Confirm the model and signal

    Confirm that the displayed or observed condition exactly matches “descaling symbol does not switch off” before changing anything.

  2. Prepare the appliance safely

    Let Melitta Purista or Latticia OT finish its normal shutdown, unplug it, allow hot surfaces to cool and empty the drip tray before removing an accessible part.

  3. 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.

  4. Interpret one controlled retest

    Refit Melitta Purista or Latticia OT exactly as documented and perform one short rinse or drink test. If “descaling symbol will not switch off” returns, stop resetting and arrange service.

Expected result

The descaling symbol should clear after the complete programme and final rinse finish without interruption. If it remains displayed, do not shorten, restart or concentrate another cycle. Note the exact stage and any other symbol, then use Melitta support to distinguish an incomplete programme from a sensing fault.

When to stop checking Melitta Coffee machine

  • End the Melitta Purista or Latticia OT check if “descaling symbol will not switch off” persists, the grinder is obstructed, hot water leaks or power trips; those signs require service.

Next step

Choose the next step for Melitta Coffee machine

For “Melitta Purista or Latticia OT: descaling symbol will not switch off”, base the decision on the documented sequence beginning with “Confirm the model and signal”, not on the warning or symptom alone.

Start with Confirm the model and signal

Work through all 4 checks for Melitta Coffee machine. If normal operation returns and no warning sign remains, the diagnosis ends without ordering a part.

Stop the Melitta Coffee machine check at a warning sign

Use the stop conditions above for “Melitta Purista or Latticia OT: descaling symbol will not switch off”. A qualified diagnosis should come before replacing the appliance whenever repair safety or feasibility is uncertain.

Sources used

  • Melitta · source in French — The cited Melitta Purista or Latticia OT manufacturer documentation links “descaling symbol will not switch off” to the user-level procedure described here.
  • Melitta · source in French — The cited Melitta Purista or Latticia OT manufacturer documentation links “descaling symbol will not switch off” to the user-level procedure described here.

Last checked: 30 August 2026