My cars ac will work for 5 minutes and then go off.. why?

The blower stops working completely will not blow on a/c or heat, but you can still hear the a/c compressor kicking in and out.

NEED TO CONNECT A VOLTMETER RIGHT AT THE BLOWER AND TEST FOR POWER & GROUND. IF BOTH ARE THERE, THE MOTOR IS FAULTY . IF BOTH ARE NOT THERE A WIRING DIAGRAM WILL BE NEEDED TO TRACE DOWN THE CIRCUIT AND FIND THE PROBLEM.

thanks