The A/C of my car keeps on stopping blowing air, when I hit the blower it starts working again, what's wrong?

-Is it the blower dying? The resistor?Sorry both wrong, blower motor is a sealed unit, brushes wearing out and when you hit it the jolt makes it run, you're going to have to replace motor. Switch not the problem. If resistor was bad would run on high speed only. if you can change speeds resistor and switch OK. Common problem.Sounds like your blower motor is crapping out.



You may be able to remove and clean it and get a little more life out of it.



Many times the blower gets a lot of dust and crud built up inside.



This results in excess heat which will eventually cause the motor to fail.
pete is wrong , it is your fan switch that is craping out. the one you move to make it start again.