Thanks for responding Sidfink. I thought that might be the case, so I actually did replaced the hose and it still didn't work. Finally, I ended up blowing on the other end of the hose to see if maybe there was something clogged up in the little box on the side of the tub that the tube for the air switch attaches to and that did it. It now works just fine. Thanks again for getting back with me and this is a great resource.