I recently picked up a used Sundance spa to help with my ailing back. I wish I could tell you what year and model it is, but my best guess is that it is a Capri. It sits 3. I have noticed that that I have a constant FLO error, and the water will NOT heat unless the jets are running. I also believe that my circulation pump is causing these issues. It buzzes and is warm to the touch, but I can't feel the water moving at all. I just don't think it is working properly. It's annoying to say the least to have to go outside every few minutes to manually turn the jets on in order to bring the water temp up. I have a new filter on order right now, but I'm afraid I may have to replace the circulation pump also. If there is any more info that you guys need from me I will be happy to try and provide it. This is my first spa and I love it, but it's also a PITA with this issue. Don't get me started on the leaking either I can say that it has an 850 circuit board if that helps any. Sorry I don't have more info to provide, but I think we can figure it out. Thank you for your time.