Error 104 on the DM300-DM475

Learn how to resolve error 104 on the DM300c, DM400c, DM475 (G920) and DM300M, DM400M, DM475M (G922).
Products affected: DM300c™, DM400c™, DM475™ (G920), DM300M™, DM400M™, DM475M™ (G922)


The franking machine displays Error 104 when trying to add postage.


You must add postage in multiples of £50


Press the Clear key until the home screen is displayed.

Then follow these steps to add postage to your franking machine.
  1. Press the Refill Postage key. The display shows the postage funds available in the franking machine.
  2. Select Add Another Amount.
  3. Select an amount that is a multiple of £50, then select Continue.
  4. Press Enter to confirm the amount.
  5. The machine will connect to Pitney Bowes and displays Connecting, Processing and Adding Postage.
  6. You will be prompted to print a receipt - confirm with either the Yes or No button.
  7. The franking machine will check for any pending downloads, for instance new rates or software updates. Follow any prompts to download and install any updates.
  8. Once the process is complete, the franking machine will return to the Home screen.

UPDATED: 23 March 2022