I need a cicuit board for a sentry 605 control box in a 1988 sundance royale. I also need a flow switch for the same spa. If anybody has any of these parts in good used condition, please let me know!!!
Thank You, -Brian-

Decent used boards for this system are impossible to find and re-built boards tend to last not more than 6 months...You can get a new replacement for around $300 from
866-364-9681 X102 (mention this posting for additional discounts)

thanks I may get a new replacement but I am going to hold out just a little longer to see if i can find a used one. again thank you for the info -Brian-

I may be able to rebuild your old board, for a spare, depending on what problems you were having. If you can descirbe the problem, and are interested in this route, let me know.