Question about 2001 Chevrolet Blazer

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Heater core leaking put in bars leak now smoke/fog coming from vents ?

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Heater core is still leaking, now you get to replace it,not to bad a job...HAVE FUN

Posted on Nov 14, 2010

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1 Answer

Y do my front window keep fogging up and white smoke from vents only


This symptom is usually a sign of a coolant leak from the heater core. The fog/smoke leaves a film on the glass. Often you get a sweet-sort of aroma as well. Check for loss of coolant. If you are low, check the heater core for leaks and replace as needed.

Nov 17, 2016 | Cars & Trucks

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My 2001 jeep grand cherokee has a dark mist/smoke coming out of the vents, and defroster. But, the heater works fine. What could it be?


DO NOT USE STOP LEAK!!!!!! That stuff has no brain so you cant tell it to plug only specific leaks. It will go for the easiest hole to plug which can be a water port in the cooling jacket for the cyl heads. replace the heater core. Fix it right or bypass but please please please do not use anything that will stop a leak

Dec 22, 2012 | Cars & Trucks

1 Answer

The radiator cap was replaced on my truck and now smoke is coming through my vents when i turn on heat the windows fog up and the defrost fogs my windows


it sound to me that you might have a slight leak in your heater core. The leak is what s causing the windows to fog up, cause it's actually radiator fluid leaking. Is there any odor present?

Nov 19, 2010 | 2000 Dodge Durango

3 Answers

Smoke is coming out of my vents


You have a leaking heater core. Leaking antifreeze into the heater case. Soon you will have a puddle on the passengers side floor.

Feb 27, 2010 | 1988 Ford F 150

5 Answers

White smoke-like stuff comes out of heater vent of my car.


sharp acidic smell would be electrical
sweet smell would be coolant.

Feb 06, 2010 | 2000 Buick LeSabre

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99 Grand Cherokee fogs windows on warm defrost, but not on cold


absolutley,change the heater core,its a small radiator,with a tiny hole,it still works,but it leaks,it will continue to get worse over time

Oct 06, 2009 | Jeep Grand Cherokee Cars & Trucks

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

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Antifreeze smell and smoke coming out of vents


You have a coolant leak most likely in the heater core. Try disconnecting your heater hoses and coupling them together, then running the engine to see if the leak goes away. If it does, I would have the heater core replaced.

Dec 28, 2008 | 2001 Chevrolet Blazer

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