Hello Everyone, Hoping you might be able to help me out (again). Currently, my brew pressure is set to 10 bar with blind portafilter. Usually, this gives me about 8.5 to 9 bar at the puck. This morning, I noticed a drop in pressure at the puck to 7.5 bar. I had not changed the grind, dosing, or tamping. I've also noticed that the brew gauge oscillates very slightly, and that the pump noise is a little different. I put a blind portafilter in and measured the pressure - got 10 bar and the pressure held, no problem. Why the sudden drop in pressure at the puck? Could it be a grind adjustment issue, or a problem with the pump? It is a vibe.
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