Why does my car smoke and make a loud humming noise when driving with the ac on?

2002 MERCURY SABLE
210,000 MILES
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FDPARIS
  • MEMBER
  • 1 POST
I turned on the cold air, heard a loud humming noise. turned off the ac and white smoke started coming out from the under the hood.
Feb 29, 2012 at 10:21 AM
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SATURNTECH9
  • ✓Experienced Mechanic
  • 30,869 POSTS
See if the ac compressor is siezing up see if the center of the ac compression turns without a lot of effort.Let me know what you find.
Feb 29, 2012 at 10:32 AM
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