Braun Aromaster 10 coffee maker

Question

I have a Braun Aromaster 10 cup coffee maker which is not keeping the coffee as hot as it has been. Now it is also not allowing all the water to drip through. Some does, then it stops for quite a while, lets a little more through and stops again...........etc. This machine is only a couple of years old. I had the 12 cup which lasted for many years.

Please help! Thank you.