All lights on, ready to brew, push button, pump starts runs for about 3 seconds and stops.

Descale it again.

Sounds like safety switch (heat sensor) check warranty

fill it with clr and run it 2 times,then run it with fresh water each time 2x to rinse it,save the clr it is still good,use a water filter on the water

I looked up your problem and found the same one was answered previously on fixya. I have copied and pasted the previous answer here for you. Good luck and I hope you have a great day!
After many months, I solved the problem of the red light staying on the Tassimo Coffee Maker. Use these easy steps.
1. Fill a 2 cup measuring cup with hot water.
2. Mix in descaler.
3. Pour in the empty water tank.
4. Put the yellow cleaning disk in the chamber and close chamber. Put the two cup measuring cup under the spout.
5. Push and hold the brew button for about 3 seconds (until the red and green light flash.
6. Now don't touch the machine. It will do it's thing for about 20 minutes. (Don't be impatient and start to push buttons, just leave it)
7. When it finishes it's cycle. The red light will turn off. Then clean the water tank and put fresh water and run clean water through the brewing cycle 4 times. Your machine is now ready for use.

1. Fill a 2 cup measuring cup with hot water.
2. Mix in descaler.
3. Pour in the empty water tank.
4. Put the yellow cleaning disk in the chamber and close chamber. Put the two cup measuring cup under the spout.
5. Push and hold the brew button for about 3 seconds (until the red and green light flash.
6. Now don't touch the machine. It will do it's thing for about 20 minutes. (Don't be impatient and start to push buttons, just leave it)
7. When it finishes it's cycle. The red light will turn off. Then clean the water tank and put fresh water and run clean water through the brewing cycle 4 times. Your machine is now ready for use.



Found the answer on another fixya post. Seems like about the same product.

http://www.fixya.com/support/t6123164-tassimo_red_light_stays

I have one. It's easy. Push the program button. The little green light in the lower left corner will flash. The only tricky part is that you only have about 3 seconds to begin setting your time. After that the light stops flashing and you will be changing the regular time. While you are pushing the Hour or Minute buttons you have all the time you need to set your brew time, but once you stop you're back to the 3 second timer. Remember, if the light in the upper left side is on, the time is PM. To turn the timer on, push the Auto button and the little light in the lower left will come on and stay on. To turn it off, just push the Auto button again. Another caution, there is no "safety" for the Hour and Minute buttons. If you push either of those buttons while the lower left light is flashing you are changing the brew start time. If it is not flashing you are changing the real time. In other words, if you push either of those buttons at any time, you are always changing something. Happy brewing.

After many months, I solved the problem of the red light staying on the Tassimo Coffee Maker. Use these easy steps.
1. Fill a 2 cup measuring cup with hot water.
2. Mix in descaler.
3. Pour in the empty water tank.
4. Put the yellow cleaning disk in the chamber and close chamber. Put the two cup measuring cup under the spout.
5. Push and hold the brew button for about 3 seconds (until the red and green light flash.
6. Now don't touch the machine. It will do it's thing for about 20 minutes. (Don't be impatient and start to push buttons, just leave it)
7. When it finishes it's cycle. The red light will turn off. Then clean the water tank and put fresh water and run clean water through the brewing cycle 4 times. Your machine is now ready for use.

Hi Try reprogramming the machine. Push and hold the button for the coffee you want, but hold it all the way through the process. Don't release the button until you get the amount of coffee you want for that button, then release the button. That should get you the same amount next time. You can do this for each coffee button. If that doesn't fix it, then you might need a new flow meter.

A common problem that can occur with the Cuisinart coffee maker is it will stop brewing, even when there is water ready to be transformed into coffee. The machine still turns on and works like it should, but does not continue brewing an entire pot of coffee, and acts like it has finished brewing even when there is still water sitting in the bin. This type of problem is pretty common among various coffee makers, and usually occurs when there is a problem inside the machine.
One of the best ways to fix this problem is by flushing the coffee maker out with a vinegar solution, which can be made with equal parts of vinegar and water. It should be poured in the same place as the water that is ready to be brewed, and will help to clear out the machine and make it ready to start brewing again. This problem is usually caused by calcium building up within the machine, and the vinegar helps to clear out any blockage to help it start running smoothly again.

You will have to adjust your shot timing, and possibly your grind. To program the shot timing, hold the Brew Stop button until all of the brew lights come on; That means all of the buttons are ready to program. Next, pull some grind for your portafilter and push the button you want to program. For a single, you want to pull a 1 oz shot in about 15-20 seconds; longer for a double. When you push the button, the shot will start to pull; when the shot is complete, push the button again to set it. Then do the same for the next button. Each group needs to be programed separately. Holding the the Brew Stop button again will turn out the remaining lights and save your programming to that point. As to the grind, you want to have the grind fine enough to give you a quality shot in the right amount of time. Good Luck!