How to Descale a DeLonghi Magnifica S

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Even if you clean your coffee machine regularly, the mineral deposits in the water can result in the build-up of limescale on the internal components.

This can impact the taste and temperature of your coffee and can also impact its useful life.

Below, we cover the basic steps for descaling your DeLonghi Magnifica S coffee machine.

How to know if your DeLonghi Magnifica S needs descaling

Your DeLonghi Magnifica S coffee machine will let you know when it’s ready for descaling with a flashing descaling alert light on the control panel.

When you see this alert, don’t leave it too long before conducting the descaling process, to prevent any damage from occurring to your machine.

How to descale a DeLonghi Magnifica S

1. Turn on your DeLonghi Magnifica S

2. Empty the water tank

3. Pour DeLonghi descaler solution into the water tank up to the level A marking then fill up to level B with water

4. Place a large empty container under the cappuccino maker (minimum 1.5L).

5. Press the descaling button for at least 5 seconds 

6. When the steam light flashes, turn the steam dial a half-turn anticlockwise to the I position. The descaler solution will now flow out of the cappuccino maker into the container. 

7. The descaling process will take about 30 minutes. The water tank will be empty and the steam and water lights will flash. 

8. Turn the steam dial clockwise to the 0 position. 

9. Place an empty container under the cappuccino maker for the rinsing process. 

10. Empty and rinse the water tank before refilling

11. Turn the steam dial anticlockwise to the I position

12. The rinse process is complete when the water tank is empty, and the steam light flashes. 

13. To complete the descaling cycle, turn the dial to the 0 position.

Here’s a video that walks you through the process:

Why do you need to descale your DeLonghi Magnifica S?

You need to descale your automatic coffee machine from time to time.

If you don’t, the limescale created by the minerals in the water will clog up its working parts, reducing its efficiency and making it more likely that it will break down. 

Limescale build-up can also impact the taste of your coffee if you let it build up for long enough.

Coffee tastes best when it’s made with hot water at the perfect temperature. But lime-scale on your machine’s heating elements can prevent the water from reaching its optimum temperature for brewing. 

You’ll end up with a cup of coffee that is weaker than it could be, and you might even see the deposits in your cup.

What does descaling a coffee machine do?

Descaling is the process of removing mineral deposits that have built up inside your coffee machine over time. Coffee machine descaling solutions are generally acidic compounds, such as hydrochloric acid.

The acids break down the calcium carbonate and magnesium carbonate in limescale. By breaking down this material, they keep the coffee machine clean and allow you to enjoy tasty coffee.

Can you descale a coffee machine with vinegar?

Some people descale their coffee machine by running vinegar through it. The process involves mixing one part white vinegar with one part water and running it through a brewing (or descaling) cycle. Afterwards, run the machine through another full cycle with plain water until there’s no more vinegar taste.

However, many coffee manufacturers recommend against using vinegar.

In fact, here’s what Delonghi say regarding descaling the DeLonghi Magnifica S:

Use De’Longhi descaler only. Under no circumstances should you use sulphamic or acetic based descalers. Their use invalidates the guarantee.

Vinegar contains high levels of acetic acid (this is what makes it an effective cleaner against calcium deposits and scale build-up) so the vinegar method is clearly not endorsed by Delonghi.

Can you descale a coffee machine with citric acid?

Citric acid is a safe, natural descaling agent. You can use it to descale your coffee machine by mixing 1 part citric acid with 250 parts water.

However, be sure to always check the instruction manual for your specific coffee machine to ensure citric acid won’t damage it.

Can you descale a coffee machine with lemon juice?

Lemon juice is another way to de-scale a coffee maker. The mixture of equal parts water and lemon juice, widely recommended, is a natural method that allows you to avoid using harsher cleaning products. 

Lemon juice contains citric acid, which works to dissolve the calcium deposits in your coffee maker.

Again, be sure to always check with the manufacturer of your specific coffee machine to ensure lemon juice won’t damage it.