2003 Audi Quattro 6 cyl All Wheel Drive Automatic 70,000 miles
When heater fan was turned on the fan in front of the radiator would squeal. Car is 2003 Audi Allroad 2.7 Twin Turbo. Replaced fan in front of radiator & there is still a squealing noise coming from the front & only hapens when the front fan cycles on. That fan cycles off & on frequently and emits a singing high pitched squeal. Any idea what is going on?