Why does my car rattle when I turn the AC on?
Why does my car rattle when I turn the AC on? Your engine is under a heavier load when you run the AC. That means rattles can stem from any number of issues like a bad catalytic converter to a failing power steering pump pulley. So if you turn on your AC and hear a rattle, it may mean you have a failing or bad: AC compressor. Why does my air conditioner make a squealing noise? In most cases, a squealing car air conditioner noise is caused by a worn out serpentine belt. The serpentine belt is a long, winding...