Tassimo Bosch - vessel parts fell out that keep water in.

SOURCE: Part missing from tassimo braun coffee maker

Hi,
If you can identify the part from their User guide - HERE

Then phone the customer service centre to get the part sent out to you. Have a credit card handy to speed things up. -

Braun Customer Services -

If this provides a solution to you, Please rate as Fixya as I do this for free.
Thank you.

SOURCE: bosch tassimo

Solution: Just refill the water tank with water (no descaling solution) all the way to the "Max Line". Then run the full descaling program again --takes approx. 20 minutes. After the program runs completely you will get the yellow "standby" light on and the red "descaling" light will be off.

Next time you descale, be sure and fill your water tank to the "Max Line" before running the descaling program.
Hint: An incomplete cycle (not full tank) is what makes the red light stay on. In other words, it's staying red to tell you to run a full cycle (beginning with the water tank filled to the "Max Line"). Hope this tip is helpful!

SOURCE: tassimo coffee maker part replacement

If your machine is made by Bosch then go to www.bosch-eshop.com where you can order spare parts online. I think the part number is 616231:Jet and is called a Tassimo piercing unit.

SOURCE: help

maybe you have blocked the hole with the rubber grommet.
disassemble and reinstall it properly

SOURCE: Where can I locate the part of the Tassimo coffee

You need the piercing unit, and you can find them here at Braun's parts site. Thanks for using Fixya!