what causes the air to click on and off while driving

Does it get cool when you are driving and then warm when you are sitting at a stop light

My car air condition wud run cold then all of a sudden it wud blow out hot air while driving then blow cold air again

You might start the car then turn on the AC. Open the hood and look at your radiator fan....it should be turning. If not, that may be one of your problems. It sounds also like it may be low. You need to take it to have gauges put on it to make sure the system is fully serviced. There are times leaks develop. They may even put leak detector in it.

The most common reason for a fast cycling ac clutch is low om chargeam have that checked first.

Ac condenser fan probably not working.