2002 Mercedes Benz S320

2002 MERCEDES BENZ S320
90,000 MILES • 6 CYL • 2WD • AUTOMATIC
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RON HARRIS
  • MEMBER
  • 1 POST
my heater is blowing cold air. It seems to be workinf ok except the warm air is not getting to the passenger cabin
Dec 3, 2008 at 6:33 AM
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GFIMOTORCARS
  • ✓Experienced Mechanic
  • 673 POSTS
This is often caused by a failed heater exchange valve. The exchange valve allows for coolant passange into the heater case, and when it fails results in cold air coming through the heat settings.
Feb 19, 2009 at 5:11 PM
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