Hmm, sounds like the pump pressure is set too high. For reasons best known to themselves, machine manufacturers often ship machines with brew pressure set to anything up to 12 bar, when ideally you want 8-9 bar for good extraction.
If you take a look inside the machine (unplug it first) there may be an adjuster screw on the pump. Turn it down 1/4 turn and pull a shot then repeat until the shots start looking and tasting better.
If you get no joy descale the machine which should help (you need to do this every 3 months anyway), and if that doesn't fix it then the over-pressure valve (OPV) may be at fault.
Hmm, sounds like the pump pressure is set too high. For reasons best known to themselves, machine manufacturers often ship machines with brew pressure set to anything up to 12 bar, when ideally you want 8-9 bar for good extraction.
If you take a look inside the machine (unplug it first) there may be an adjuster screw on the pump. Turn it down 1/4 turn and pull a shot then repeat until the shots start looking and tasting better.
If you get no joy descale the machine which should help (you need to do this every 3 months anyway), and if that doesn't fix it then the over-pressure valve (OPV) may be at fault.
Happy fettling.