Error: 12A9, how to resolve on the DM800, DM800i and more

Products affected: DM800™, DM800i™, DM900™, DM1000™, and DM1100™


The meter displays error code 12A9 and will not run.


These error indicates the WOW is out of calibration and will not function. It can occur because:
  • Pieces of paper are stuck in the WOW
  • The mail piece too thick was attempted to be fed through the machine
  • Leaning on the cover or skis while feeding mail in WOW mode
  • Machine was moved and now is not level or on an unstable table.  When moved, the machine has to be tested and re-calibrated by a service technician.


You may be able to clear the error by simply restarting your meter.  Here are the steps to follow for a safe restart:
  1. Turn the power off with the power switch, located on the left side of the equipment; wait for the display to turn off
  2. Wait one minute, then turn the power switch back on
If your issue is not resolved, contact customer support from 8 am to 8 pm Eastern Time. Have your model number ready.

NOTE:  You may be able to run mail by selecting a different weighing method.

UPDATED: May 14, 2015