Jura Impressa F70 - drainage valve dumping water

[Bannywhey]

Hi all,

first post so hoping you guys can help me out. I have stripped down the brew group and got a new drainage valve for my F70 but every time I press rinse or make a coffee the drainage valve dumps all the water into the train. I have used an airline to clear everything out. It is almost as if the valve is not being engaged properly by the motor that pushes the valve from the other side.

Has anybody had this problem before and can you help me? I changed all the seals in brew group a few months back so I am confident that is ok.

thanks in advance.

S