A WDSS has three LEDs:

  • Yellow charging LED
  • Red/green Bluetooth LED
  • Red/green run LED

For longer runs, the run LED flash time can last as long as a minute.

If the run LED never stops flashing red or is solid red, WDSS memory is corrupted. Unfortunately, this cannot be repaired.

See also: What do you recommend to replace the WDSS?