Hi i turn my a/c n heater but inside no air at all. The car has everything in it, compressor ect. What can the problem be?

 

Most likely, the 12V feed to the control head.

Remove the control head. You will find a brown wire on the "function" switch. That's the one that brings power to the whole system. Follow it back up into the dash about a foot. Where it plugs into the main dash harness, you will find a connector of UNBELIEVABLY STOOOOOOOOPID design, that ALWAYS fails. Its contacts are too small for the amount of power it has to carry, and it uses the plastic to provide the tension that keeps it together. It has NO CHOICE BUT TO burn up. You will find that it is burnt to ashes. Cut off both halves of it and replace it with the BIG FAT WIDE YELLOW slide terminals, preferably insulated. Not, the little narrow weenie ones that are just like the blue and red ones; you want the BIG FAT WIDE yellow ones.

Once you've done that, go out under the hood, and look at the blower motor. It has a single fat purple wire going to it. Follow that wire; you'll come to a small box where it joins a bunch of other wires to plug in. That's the high-speed relay. One of the wires in that plug is a big fat red one. Follow that wire; it leads across the windshield cowl toward the wiper motor; about over the right valve cover or thereabouts, you'll come across another of the exact same STOOOOOOOOOPID connector in the exact same state of failure, which is why the high speed quit working long ago, even before all the other speeds stopped. Replace that one too.