Descale indicator remains on even after descaling has been performed.

Safety first: Unplug before internal inspection.

Steps:

• Repeat procedure: Perform the descaling cycle again, strictly following the Tefal manual, including the final rinse steps.
• Manual reset: Some models require a specific button combination to reset the descale light. Refer to the manual and perform the reset.
• Check flow meter: If the machine does not detect enough water passing through, the indicator may not reset. Descale again and ensure full flow.
• Service if persistent: If the light remains on despite correct procedure and good flow, the control board or sensor logic may be faulty.