Need more info.Originally Posted by 726E6F756F010 link=1283841645/0#0 date=1283841645
1: What is a Water back-flush ?
2: How was this performed ie. What filter basket / insert etc ?
3: How often do you do this ?
4: What is Optimum ? Please give a number such as a position on a clock
5: Flicking back and forth ? How much 1mm or 10mm ?
6: When have you last removed teh shower screens and cleans teh two ss screens
7: When did you last Chemical clean and do a De Scale.
8: Do you updose / OVERDOSE
9: What grinder and beans do you use ?
In a nut shell. Sounds like coffee grinds being forced back into the system if I was to make a guess.
Possible outcome = Blocked line leading to the Gauge and Dump Solenoid for release of pressure at the end of a shot.
If not resolved ASAP- Then a good chance this will lead to a service visit and possible $$$ repair. (depending on who your service agent is).