WillieB

Thanks Appreciate the feedback

New to having a spa and just purchased a used Ohana Spa tub 25 jets and it has this sensor, in the spot where a jet should be. The wire coming out to back of it was not hooked up to my Balboa VS control system, Just needed info on what it could be? I was thinking a heating sensor but not sure where to hook it up to the Balboa. Thanks for any help i can get.