Is your car AC fan making noise, especially when it’s turned all the way up? This noisy AC fan is likely an issue with your blower motor. In this video, our mechanic shows you what to do if your car AC or heater makes so much noise that it sounds like an airplane that’s ready to take off. Watch now to find out how to diagnose and fix noisy air conditioner and heater sounds like vibrating, rattling, or grinding: