ok this is pissing me off. When i turn on the A/C it SOMETIMES works but most of the time it doesnt. And if it by some miracle it DOES work, it only last a few minutes b4 it starts to lose its coldness. my friend tells me to put freon but when i put freon the car doesnt take it and spits it back out. What could be the problem? its getting close to summer and i need working A/C