Machine displays ER10 and cannot complete a shot; may stop mid-brew

Safety: Unplug the machine before removing any covers. Release pressure by allowing the machine to cool.

• Check coffee puck resistance:
  • Use a coarser grind and slightly lower dose to ensure you are not over-restricting flow.
  • Test with a single-wall basket and then with a blind cleaning disc to compare behavior.
• Clean group head:
  • Remove and thoroughly clean the group head shower screen and screw.
  • Backflush with Sage-approved espresso machine cleaner if your model supports backflushing.
• Descale: Run a descale cycle to clear any scale from the OPV and internal passages.
• Internal checks (advanced):
  • Inspect the OPV (over-pressure valve) for blockage or misadjustment.
  • Check the pressure sensor connection to the pump/manifold and to the PCB.
• Repair: Replace a faulty pressure sensor or OPV assembly if they are not responding correctly. Calibration may be required.