Heater noise?
When I run the heat on low, after the cooling fan spins and stops, I hear a slight
whistling/grinding noise. Almost like dry pulley bearings. It makes a short noise
then stops. Then repeats every time the fan kicks in and stops. Is this the fan or
some kind of pulley? I only hear it when I sit inside the car, If I listen under the
hood the sound is drowned out by engine noise. 09 Corolla Sport. 120 k miles.