I have a Niagara XSpadition Hot Tub that has worked fine for the 3 years that I have owned it. Now for some reason the air button/switch that turns the jets on does not seem to work. Now the only way to get the jets to turn on is to set the temperature around 100 and then when you want the jets on you have to turn the temperature up and the jets will come on and stay on until the temp raises to that setting. This works out ok for the most part but I would still like to fix the problem with the air button/switch if it is not too costly. I know that the button is pushing air to the motor....but for some reason the jets will not come on. Any help would be greatly appreciated.
Thanks,
Joe

If this is an air switch, first thing I'd do is check the air tubing to make sure it doesn't have a cut in it. You'll need to blow into the end and stop the other side to see if it has any leaks. You can get the small hose locally pretty cheap.

Otherwise, for a standard air switch setup, the buttons are like this:
http://spapartsnet.com/p_Spa-Parts-Air- ... 4_1_1.html

The business end that does the switching is this (if yours has 6 terminals):
http://spapartsnet.com/p_Spa-Parts-Elec ... 1_1_1.html

and if it has only 3, then this one:
http://spapartsnet.com/p_Spa-Parts-Elec ... 3_1_1.html

That should do it. And it's not too expensive either.