Machine displays 'LOCK HOPPER' and grinder will not run

Safety: Unplug the machine before removing the hopper.

• Remove and reseat hopper:
  • Empty beans from the hopper.
  • Reinstall the hopper and rotate it firmly to the LOCK position until it clicks.
• Inspect lock tab: Check the underside of the hopper for a plastic tab that actuates the internal switch; if broken, the machine will not detect the lock.
• Clean area: Remove any coffee grounds or debris around the hopper mount that may prevent full rotation.
• Internal switch (advanced):
  • Locate the hopper lock microswitch inside the grinder housing.
  • Test it manually to confirm it changes state when pressed.
• Repair: Replace the bean hopper if the lock tab is broken. Replace the hopper lock microswitch if it is not functioning.