When your TASSIMO Happy shows a red light next to 'calc', it's time to descale your coffee machine. Watch the descaling instruction video or follow the steps below.

1. All you need are 2 Bosch TASSIMO descaling tablets and a container of min. 17 fl. oz.

2. Take the water tank from the side of your TASSIMO Happy and fill with fresh water up to the marking 'calc'. Add the two descaling tablets and wait untill fully dissolved. Place the water tank back in the machine.

3. Take the Service Disc from the bottom right side of your TASSIMO Happy machine. Place the Service Disc with the barcode facing down in the coffee machine where your normally place your coffee pod.

4. Place the container under the machine and hold the start/stop button for about 5 seconds. The descaling programm will now start. The status and descaling 'calc' lights will flash to indicate the machine is descaling.

5. After approximately 30 minutes, both lights will stop flashing and will light up. This means the first stage is done. Empty the container and clean the water tank with a soft cloth. 

6. Fill the water tank to the maximum and place it back. Also put the container back under your machine. Now press the start/stop button. The cleaning programm will now start.

7. The status light will flash during cleaning. Once it lights up, the programm is done. Empty the container and repeat the same cleaning program (from step 6) 2 more times to make sure all the descaling solution is gone.

8. Once finished, remove the Service Disc and stow away in your TASSIMO Happy again. Fill the water tank with fresh water and place back into the machine. Your TASSIMO Happy has now been descaled and is ready for use again.