AEG CF 120

Hello,
with my aged and until 3 days ago still functioning AEG CF120, the coffee outlet became slower and slower.Entkalkt regularly as prescribed, no change.Habe thereupon a new brew group installed since the old already very versüfft looked.Also there no improvement.The cartridge heater was replaced a year ago.
I still have a functioning identical Krups Orchestro, I have removed the pump, as well as the flowmeter and tested at the AEG, also no change.
It also runs no rinse water through.The brew group works normally.hoses are without lime deposits.Now I'm at a loss,
Does anyone have a tip.

Outlet valve checked? Pump loud or quiet?

So the pump I have exchanged alternately with the identical Krups Orchestro, at
the it works perfectly.the outlet valve would still be an option, I have to probably still ran.
Thank you, I'll get back to you.

As it looks the tappet is defective, molded seal no longer has a hold.
Order me new exhaust valve, tappet single I have not been able to find, also does not cost the world.
Thanks

Hello,have changed the outlet valve with the defective tappet,still came no water.
Then searched further u.the hose at the bottom of the heater abgedreht,which was completely calcified,despite regular decalcification.Now runs again coffee after the hose was replaced.
Thanks to all