We just purchased a new home with a Agua Link R6 controller. The spa over flows into the pool continually. How can I heat the spa to 105F but keep the pool at 85F with this hot water overflowing constanly

SOURCE: Spa water drains to pool

Here is a link to the Aqualink website so you can download a trouble shooting guide.

SOURCE: Jandu Aqualink Pool/Spa Controller RS6

AQUALINK GUIDE BOOK

SOURCE: We just moved into our home and there is no manual

Here is a link for the Manual and trouble shooting guide. Aqualink

SOURCE: Why am I getting a 6700 REV C message on my AquaLink RS6 home spa

I had the same issue, but only after I pressed the reset button on the side of the panel. After a couple of days of troubleshooting, I found a small nick in the wiring from the outdoor unit to the indoor paneI. I turned off the breakers to the pool equipment, rerouted a new cat5 cable, but cat3 will work just as well, wired it up and all was good. A local pool guy wanted to charge me about $2000 to replace both units. I spent less than $5.

Good luck

SOURCE: I have Jandy RS4 system with 4-button poolside

Pull the cover off the control panel. You will probably find a button which would be accessible from outside the panel with a paper clip or pencil but is unlabeled. On the board itself by the button, in small letters it should say "reset". Push the button and see what happens.