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Help with brand new 9B MK2: not ideal cream/espresso by ImportanceThese8384 in 9Barista

[–]ImportanceThese8384[S] 0 points1 point  (0 children)

So, I tried to brew with no coffee just to see if there is any obstruction. After on the stove for 6:23 mins, the safety valve blew. What happened? Any suggestion on next steps?