post purge

I have a less than 2 year old, builder installed Navien water heater that has decided to be in a constant post-purge when it is not being used. The status alternates between POST-PURGE AND DHW-WAIT. I noticed this about a week ago as I heard a vibration upstairs and it was the water heater...

Hey Gang, Sorry for the length of the post. I have a couple issues and I have posted on other sites before and realize that there is a lot of info needed to paint a picture for someone. I can grab a few pics also if needed. I'm troubleshooting an issue that is a little out of my comfort zone...