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De'Longhi Coffee Machines Help Center
DedicaSteam light flashing


Steam light flashing

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The appliance needs descaling


Follow the guide below for detailed instructions:


Before descaling

Before use, read the instructions and the labelling on the descaler pack.

You should use De'Longhi descaler only. Using unsuitable descaler and/or performing descaling incorrectly may result in faults not covered by the manufacturer's guarantee.


If present, remove the water softener filter


Add the descaler solution to the tank


Dilute the descaler solution by filling the tank with water to the MAX level


Press the ON/OFF button


Make sure the filter holder is not attached and position a recipient under the hot water spout and boiler outlet


Wait for the following lights to come on steadily, indicating that the appliance is ready for use


Press and hold the steam button for 10 seconds until the three buttons flash in sequence


Turn the steam dial to


To start descaling, press

The descale programme starts and the descaler liquid comes out of the water spout.

The descale programme removes limescale deposits from inside the appliance by automatically performing a series of rinses and pausesuntil the tank is completely empty.

Please note
During descaling, to clean the boiler outlet, close the steam dial from time to time to deliver small quantities of descaler from the boiler outlet.


The appliance stops operation and the orange steam light continues to flash

This indicates that the descaling is still underway.


The appliance is now ready for rinsing through with clean water

Extract the water tank.

Empty the tank.

Rinse under running water.

Fill up with fresh water up to the MAX level.

Put back in the appliance (If used, insert the water softener filter).


Empty the container used to collect the descaler solution and replace it empty under the hot water spout


Make sure the steam dial is in the following position

Then press the steam button to start rinsing.

Please note
During rinsing, to clean the boiler outlet, close the steam dial from time to time to deliver small quantities of water from the boiler outlet.


When the water tank is empty, the orange light goes out and descaling is complete


Make sure the steam dial is in the closed position (○ symbol)

The appliance is ready for use.

Please note

  • If the descaling cycle is not completed correctly (e.g. no electricity) we recommend repeating the cycle.

  • If the water tank has not been filled to the MAX level, at the end of descaling, the appliance requests a further rinse to guarantee that the descaler solution has been completely eliminated from the machine's internal circuits.

Repair of damage to the coffee maker caused by limescale is not covered by the guarantee unless descaling is performed regularly as described above.

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