Mechanics

GRINDING SOUNDS

1992 Ford Aerostar

Heater problem
1992 Ford Aerostar 6 cyl Two Wheel Drive Automatic 312000 miles

Whenever I turn on defrost I get this odd grinding sound coming from the front of the car. Now the sounds are not constant but is on and off. I would say like every 2 seconds I get a loud grinding sound. What is
odd is this doesnt happen when I just use the vents for heat it only happens when I turn it to mixed or defrost.


Any ideas would be greatly appreciated.

Thank You
Avatar
Logan7221
November 28, 2009.




Defrost setting turns on the A/c compressor, pulley bearing may be no good. Remove the serp belt and spin the pulley by hand, is it smooth with no binding?

Merlin2021
Nov 29, 2009.


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