I lost water pressure and volume on the Bezzera the other day, to the point that I simply could not pull a shot.
Had me confounded, so put the thinking cap on, what had I changed that could have caused the problem, then the penny dropped, the previous evening I had removed the water tank to give it a wash out, replaced it without problem then topped the water up and promptly forgot about it as I considered the job done and dusted.
Wrong, seems the O ring on the water tank was poorly seated, it was allowing air to be sucked into the system, easy fix, remove the tank, give the O ring a smear of food grade grease, replace tank, problem solved.
I suspect I will need a new O ring in the near future.
Wish all of my problems were this easy. 🙂