Sorry if this has already been posted but I couldn't find anything. I have an outdoor Jacuzzi hot tub that was purchased about 1994. It has the "diaphram" air type controls. The control that works the air and lights on the left works fine but the one to the right that controls the jets always gets stuck on filter mode. I'm guessing theres a air leak somewhere in the line, but any ideas where to look first. Do I pull off the panel underneath the controls or go through main panel? Any trouble shooting advice or things to check first would be greatly appreciated!! Thanks!