ProductFilter coffee maker ICM16XXXThe coffee has an acidic taste
Filter coffee maker ICM16XXX

The coffee has an acidic taste

Try this solution

Descale the machine

Potential cause:
The coffee maker needs to be descaled.

Do you need descaler? Delonghi's EcoDecalk has been specifically designed with your machine in mind. Using this descaler regularly will prolong the lifespan of your machine and keep it running at optimal performance.

De'Longhi Coffee Machine Descaler EcoDecalk 500ml Best Value Pack (delonghi.com)

Follow the guide below for descaling instructions: