To clear the "Rear access door open" error message:

  1. Remove the rear access door from the printer.
  2. Reinstall the rear access door on the printer and verify that both latches are securely engaged.
  3. Unplug the AC adapter from the printer.
  4. Plug the AC adapter back into the printer.
  5. Wait for the printer to initialize.
  6. Verify that the error has cleared.