Jacuzzi problem

We bought a brand new house 4 years ago and have not used our jacuzzi except when we moved in. I've been trying to use it now but wont continue functioning. I've checked the electrical wiring and its looks okay. What happens everytime I push the air button, the air jets will stay on for about 20 seconds and then stop. The same happens even if I repress many times. Im almost sure that the electrical wiring is okay. Can it be the air button? If the culprit is neither of the two, Im screwed because my jacuzzi is built with solid tiles skirt. There is no opening to check the system inside. I need help pls. Any expert around. Any advice will be appreciated.