It is a question that, as we have been able to verify both on the Internet and in various comments on our website (for example, in the article on repairing the Dolce Gusto coffee machine, or in the article on the colours of the power button), is relatively frequent among users.
The Dolce Gusto coffee machine does not switch on (in fact this can also happen with Nespresso machines). The power button does strange things or blinks when it should not, the Dolce Gusto coffee machine stops itself as soon as it is switched on, or it switches on but does not heat the different water symptoms for the same common cause.
The problem is electrical, and usually manifests itself in two ways:
- First, we turn the coffee machine on, the button turns red, and after a few seconds, it turns off. There is nothing else we can do, and there is no way to make the coffee machine operational.
- Or, we turn the coffee machine on, the button turns red, and then it stays green blinking indefinitely. In this case, we can use the coffee maker, but we will notice that it is not able to heat the water.
If you know how your Dolce Gusto works (if not, you can check it out here), it will typically stay red for a few seconds after you press the power button, and then turn to a steady green, never blinking. It would indicate that the coffee maker has already heated the water and is ready for use.
So, as you might have guessed, when the problem described above occurs, the consequence is that either the coffee maker does not turn on, or if it does turn on it does not heat the water.
The capacitors of Dolce Gusto coffee machines (and other capsule machines)
It is a problem that is often related to capacitors. Replacing the capacitors with new ones (which involves accessing the electric plate of the coffee maker, unsoldering the old capacitors, and soldering the new ones to it) will solve the problem. The electrical current will arrive again usually to your Dolce Gusto coffee maker, and therefore when you turn it on, you will see the usual behaviour again. The power button will change from red to green, and the coffee machine will heat the water again.
As mentioned above, this is an electrical problem, and we, therefore, recommend that you do not try to repair it yourself unless you are very familiar with these issues and know what you are doing.
Now, we insist: to do it yourself you must know perfectly how to dismantle your coffee machine, how to access the electrical board, how to detect the capacitors on it, how to unsolder and solder the new ones, what kind of new capacitors you should buy and so on. The operation is simple and cheap (capacitors do not cost more than one euro, possibly less depending on where you buy them). Still, it must be done with knowledge or delegated to a professional.
In the following video, it is also explained in detail. They use a Nespresso Essenza coffee machine as an example, but the problem and the electric plate are very similar in all the coffee machines of this type (the video is in spanish but clear even if you don´t understand a single word).
In the end, as you can see, the problem comes down to the fact that the machine does not switch on correctly, or if it does switch on, the water is not heated. It is always due to a lack of electrical power, and usually due to a fault or failure of a capacitor.
In this video, they recommend replacing the standard capacitor (usually 470 nF) with the same one, or if possible, with a larger one (680 nF). Since we are replacing it, it is better to do it by a higher power one.
For more information about the electric board of these coffee makers (as we say they are very similar to Dolce Gusto and Nespresso), you can watch this video by the same user. He again stresses the convenience of replacing the capacitors in case of problems with the ignition of the coffee maker (This is the most clear video we found but also it is in Spanish, we will keep looking for better videos for you):
What do you think? Does this solve your problems with switching on the Dolce Gusto or a Nespresso?