Not Just Ford. Any vehicle with a broken recirculation door or actuator that moves this door can have this problems. However a broken blend door can be a common downside to the Ford Explorer. Can provide you with be checked easily. First, listen for increased setting up when changing the the AC to max. If for example the air doesn't sound louder in the max position, there's the chance the recirculate door is unacceptable. Next open the glove box and check out for movement of the recirculate door...