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Smoke coming out air vents - Mercedes-Benz Cars & Trucks

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If it is smoke you will smell it as if there is burning plastic. Some ac units produce really cold air and what you may be seeing is frosted air from the evaporator coming out the vents. It is an indication that the evaporator is actually icing up and not working efficiently.

Posted on Dec 30, 2013

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eitan
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SOURCE: white smoke from air vents

Could be an incorrect refrigerant charge or defective pressure switch causing the evaporator to freeze and the air flow over it is causing the ice to melt and the resulting white smoke is condensation

Posted on May 15, 2008

SOURCE: smoke coming out of the air vents while it's runnning...would you know why?

Coolant Leak or maybe refrigerant

Posted on Mar 13, 2013

skychief2001
  • 21873 Answers

SOURCE: Why does white smoke comes out the air condition vent of a Ford Explorer

The most common reason is leaking coolant, either in the engine compartment or in the heater box.

Posted on Apr 14, 2013

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Air vent schematic


air for the inside of the car comes from the vent at the base of the windscreen or is recirculated inside the car
if you see what appears to be mist, fog or smoke from the ac vents ,it is extra cold air from the ac system that is seen as fog when it hits the air in the car
you will know exhaust fumes by the smell

Nov 18, 2015 | AC Cars & Trucks

1 Answer

Why does white smoke comes out the air condition vent of a Ford Explorer


The most common reason is leaking coolant, either in the engine compartment or in the heater box.

Apr 14, 2013 | Cars & Trucks

1 Answer

Why is there smoke flowing from my ventilation vents? My truck is not over heating and there is no smoke coming from the engine. I have a 97 Ford, Expedition.


You mean from the aircon vent.Your cooling unit need a good chemical wash.Ice is forming in the cooling unit, the air outside is hot thus is the cold air forming smoke from contacting the hot air.

Jun 01, 2012 | 1997 Ford Expedition

1 Answer

Smoke coming out of a/c vents in dash. A/C still works, but not on highest setting.


Are you sure it's smoke? Probably not smoke, the coils are freezing up and the air is so cold it condenses and looks like smoke coming out.

May 29, 2009 | 2004 Dodge Ram 1500

1 Answer

1991 Dodge Dakota: smoke coming from air vents


Heater core must be leaking. Turn it on defrost and see if the windshield fogs up.

May 19, 2009 | 1991 Dodge Dakota

2 Answers

White smoke from air vents


Could be an incorrect refrigerant charge or defective pressure switch causing the evaporator to freeze and the air flow over it is causing the ice to melt and the resulting white smoke is condensation

May 15, 2008 | 1990 Volvo 240

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