Hello,
I have a 2009 Hot Spring Vanguard that is having similar issues to some other topics I found (a few LEDs are the wrong color).
https://www.poolspaforum.com/forum/index.php?/topic/27376-hot-spring-jetsetter-led-lights-problem/&tab=comments#comment-195844
As I looked into it I noticed the bar top plugs were not sealed well and water had gotten in. I dried it out and dried off the connections; however, the issue is still occurring.
There wasn’t any crazy corrosion or anything, so it seems to me that the lights and harness are ok. Is it possible the LED controller is bad? I guess I’m not sure how these lights work (what are the four pins for?), maybe water got into the larger box on the light harness?
Thanks!