This has happened 3 or 4 times now so thought I would ask if this behaviour is normal or not for my VBM Junior HX.
Normally when I start pulling a shot the brew pressure will shoot up to 10bar and stay their consistently for the duration.
Around 3 or 4 times more recently the brew pressure has bounced between 7 and 8 bar at the start of the shot (maybe 5 seconds) and then the boiler heating element switches off (finishes cycle) and the brew pressure goes up to 10 bar and stays consistent.
So, is this normal or is something on it's way out, like the vibe pump?
Normally when I start pulling a shot the brew pressure will shoot up to 10bar and stay their consistently for the duration.
Around 3 or 4 times more recently the brew pressure has bounced between 7 and 8 bar at the start of the shot (maybe 5 seconds) and then the boiler heating element switches off (finishes cycle) and the brew pressure goes up to 10 bar and stays consistent.
So, is this normal or is something on it's way out, like the vibe pump?

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