Hi I have a problem that I want to share to find a solution

I own a 2011 Mustang GT I have a problem with my air conditioner since 4 months and Im trying to solve it.

The problem is when I first turn the ac on everything is ok but after driving for a while like 20 minutes the ac wont blow air as it should even if I set full speed of the fan it will just blow less air as if the fan speed was low, It blows cold but less air it seems like something is blocking the air which I have to turn the ac of for 10 minutes or more just for it to blow strong air again.

I have changed everything 4 door motors, temperature sensor, air filter, Resistor, blower, evaporator valve, dash board control unit module, and compressor!

Nothing solved my problem so I need your suggestions ..

 

My first guess would have been low on Freon, causing the evaporator to freeze over. But, with all that you replaced, it seems like someone would have the system properly charged by now.

 

IIRC, lots of people have had problems with their AC...
Can anyone chime in as to these symptoms and if they're related to the typical failure mode?

 

Do you have NAV or base a/c ?

 

Have someone check the Freon. A slow leak resulting in a low charge will do exactly as SpectreH suggests. It took the Nissan technicians NINE business days to check the Freon on my wife's Rogue. Because the problem was intermittent they couldn't duplicate it. And because they couldn't duplicate it, they did nada until somebody at Nissan finally said, "It almost sounds like it's freezing up... maybe you should check the Freon."