Try to lift the button up and see if there is an air pipe attached to the back of the button. If there is no pipe then that is the problem.
If there is a pipe, go to the Jacuzzi Electrical Box and look on the side somewhere for air pipes attached to white or sometimes black switches.
If all the pipes are in, then the component your trying to switch on might be faulty.
And please make sure all the switches in the Jacuzzi Electrical Box are up, LOL.