drjhnjhnsn

I have an old Solana TX 2 person HT that has a problem with temperature display. If it read 82 degrees the tub will be 102 degrees. Not a big deal but I've had guests that have set the display to a 102 degrees but it gets much much hotter so there are some safety concerns. What would be the problem? (I guess I could just put tape over the display but would prefer a real fix)