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Mist from the vents

Tiny
LGHREY
  • MEMBER
  • 1998 CHEVROLET MONTE CARLO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
I have a 98 Monte Carlo and after idling, I've noticed what looks like mist coming out of the right two vents. It has no odor and my temperature gauge is fine. My fluids are also fine. There is also a noise which sounds like boiling when I turn the car to the right. It is running fine and only seems to start this after I sit idling for a while.
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Saturday, June 25th, 2011 AT 9:50 AM

6 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Is AC being operated at the time you see mist?
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Saturday, June 25th, 2011 AT 7:57 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Check for a leaking heater core. There is a drain on the a/c case on the outer firewall. Youll see water dripping their. Check it for signs of coolant.
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Sunday, June 26th, 2011 AT 12:33 AM
Tiny
LGHREY
  • MEMBER
  • 3 POSTS
It emits the mist with the a/c or only the vent on.
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Sunday, June 26th, 2011 AT 12:57 AM
Tiny
LGHREY
  • MEMBER
  • 3 POSTS
It only does this for about one minute and then it stops and may or may not do it again during the drive.
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Sunday, June 26th, 2011 AT 12:58 AM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
If humid ait coming into car then mist will happen as it goes across Evaporator. Try this run AC in recirculation mode mist should go away
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Sunday, June 26th, 2011 AT 6:24 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
I have see this at the dealership. Doc is right humidy hitting the air as it blows out.
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Monday, June 27th, 2011 AT 5:37 PM

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