Question about 1989 Mercury Sable

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The defroster does not blow out air at all...and the heating system has a peculiar scent and blows out a lite white smoke/mist

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Sounds like the heater core

Posted on Feb 06, 2010

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Windscreen keeps misting when car is parked


Is it fogging up when you use the heat or a/c? Is it fogging up after sitting outside on a particularly dewey night?

An easy fix and one to try first is turning the temperature gauge over toward heat, and setting the directional controls to defrost. Up the power on the blower for a moment. The warmer air will usually clear up a foggy windshield in seconds on a chilly or even not-so-chilly morning. The condensation on the glass needs a change of temp in order to evaporate. Sometimes you can get the same effect by using outside air to circulate through your car's blower system. Most have a way of circulating either inside-car air, or outside-car air.

If the glass fogs when you're driving down the road and have the heat on, or the a/c - do you smell something sweet or see white smoke coming out of your air vents? If so, you could have a faulty heater core. I wouldn't imagine this is the problem on such a new vehicle, but it could still malfunction.

Of course, if you're trying to wipe this fog clean and it won't go away, maybe you've got someone smoking in the car and leaving a film on the glass. It would take a lot of smoking to make the windshield look foggy though.
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Feb 15, 2014 | Cars & Trucks

1 Answer

Fix seized engine


White smoke is an indication of water in the engine. Like when you see a car with white smoke from the exhaust on a cold morning, it's heat moisture condensate in the exhaust (normal), and is being heated and converted to steam as the engine blows hot exhaust out. To test if it's water in the engine, there are two likely indications, (1) the motor oil will be milky and white, or (2) you can remove the spark plug and see if any cylinder sprays water mist when the engine is turned over. In either case the problem is a bad gasket, maybe head gasket (repairable), or a cracked block (big $$$ fix). If engine will not turn over, there could be two causes (assuming the battery and starting system is good); (1) a cylinder is full of water and hydraulically locked keeping the engine from turning over (removing spark plugs should relieve the pressure and allow you to turn the engine over (* you'll see mist or water coming out spark plug holes), or (2) the engine is seized, therefore the previous troubleshooting is unnecessary, engine replacement is necessary. Best of luck resolving this problem.

Dec 13, 2013 | Hyundai Accent Cars & Trucks

1 Answer

Aux heater blowing blue smoke but no heat


That may be antifreeze mist you see. check the heater core

Nov 22, 2013 | Chrysler Cars & Trucks

1 Answer

How long does it take to change heater core in 2000 blazer


This vehicle iam know nothing about here sorry but most vehicles require the entire dash to be removed to change the heater core,unless its a MK4 ford cortina which was external under the bonnet ,iam full of obsolete useless information sorry about that

Dec 19, 2012 | 2000 Chevrolet Blazer

1 Answer

2002 pathfinder when it sits for a long period of time n i start it it blows alot of white smoke through exhaust other than that it runs fine


White exhaust smoke usually comes from coolant in the cylinders, indicating a cracked head or blown head gasket. The best test is to pressurize the cooling system, then remove the sparkplugs and look for moisture in the cylinders. Turning the engine over with the plugs out will spray a mist from any cylinder with coolant in it.

Mar 03, 2012 | 2003 Nissan Altima

1 Answer

Winndscreen does not clear unless have air conditioner on


Blowing air across the windscreen does not necessarily clear away condensate from the inside. Water vapor condenses on any cool surface, and humid air blowing across a cool windscreen will result in more condensate on the windscreen. Often the air that blows across the windscreen is just humid AND heated, and doesn't solve the problem.
The air conditioner system performs two functions. Not only does it cool the air, it also extracts moisture, resulting in dryer air. Once the dried air is re-heated in the defroster system, it should allow the moisture on the windscreen to evaporate.
In other words, it sounds as though the defroster system is functioning properly.

Feb 06, 2011 | 1998 Volvo S70

1 Answer

My defrost isn't working. The vents just blows out smoke/fog. What is the problem?


if it's blowing out a mist, your heater core is cracked or leaking and needs replaced.

Dec 20, 2010 | 1994 Toyota Camry

1 Answer

My 01 grand am gt is overheating the cars heat will only blow cold air and alot of thick white smoke comes out of the exaust


White smoke is a sign of burining antifreeze. When heater is not blowing warm air, that is a sign of faulty heater core.
No power, coolant loss, overheating, is sign of headgasket leak.
Double check your thermostat as well.

Sep 09, 2009 | 1999 Pontiac Grand Am GT

1 Answer

Heat wont blow through heater or defroster vents


common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.

Jan 18, 2009 | 1997 Chevrolet K1500

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