Answer
May 16, 2019 - 04:47 AM
Read the description. It goes by serial number if you don't know the year. Here is the older version:
https://thenorcoldguy.com/norcold-power-board-kit-621991001-fits-the-n611-n811-
models/
https://thenorcoldguy.com/norcold-power-board-kit-621991001-fits-the-n611-n811-
models/