I have a 2007 w900l kw the ac works but no air blows in sleeper,in the cab all the air b,lows in the floor,cant get it to blow out of vents
Engine: c-15 cat
Tried swaping selector valve from defrost to air ect,only blows in floor vents
have you checked your actuators or youor blend doors in the heater box?
Experienced Diesel Technician