mist from the vents

1998 CHEVROLET MONTE CARLO
130,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
LGHREY
  • MEMBER
  • 3 POSTS
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.
Jun 25, 2011 at 2:50 AM
Avatar
DOCFIXIT
  • ✓Experienced Mechanic
  • 18,828 POSTS
Is AC being operated at the time you see mist?
Jun 25, 2011 at 12:57 PM
Avatar
CADIEMAN
  • ✓Experienced 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.
Jun 25, 2011 at 5:33 PM
Avatar
LGHREY
  • MEMBER
  • 3 POSTS
It emits the mist with the a/c or only the vent on.
Jun 25, 2011 at 5:57 PM
Avatar
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.
Jun 25, 2011 at 5:58 PM
Avatar
DOCFIXIT
  • ✓Experienced 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
Jun 26, 2011 at 11:24 AM
Avatar
CADIEMAN
  • ✓Experienced Mechanic
  • 3,544 POSTS
i have see this at the dealership.doc is right humidy hitting the air as it blows out.
Jun 27, 2011 at 10:37 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle