Question about 1991 Buick LeSabre

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There is antifreeze coming from the vents. heat does not work

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I hate to tell you this if the floor is wet on the passenger side you need a heater core stop by your local library and get your hands on a Haynes auto repair manual for your car wish you the best of luck Michigan Man.

Posted on Dec 09, 2009

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The heater core under your dash is leaking. it will have to be removed and repaired or replaced.

Posted on Dec 09, 2009

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Your heater core is leaking. It will need to be replaced ASAP.

Posted on Dec 09, 2009

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2 Answers

Is there a fuse for your heating system that could go out and could make for no heat


The heat for your car is generated by the hot antifreeze mixture in your car motor. It is circulated through your heater core. A fan then blows across the heater core warming the air for your heat. There may be a bypass valve to your heater core that is malfunctioning. you could have air trapped in the anti-freeze system, a stuck lever that switches from cold to hot, a stuck open thermostat that not letting the water heat up. This link has lots of info.
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Heat does not work in 96 gs300 . when u turn heat on cold air comes out


the heater core may have gone bad or is cloged. if you can find the return line of the core pull off the hose and see if any thing comes out

Dec 19, 2013 | 1996 Lexus ES 300

1 Answer

I changed the heating core but now my windows are fogging up when i turn on my heat and i also smell antifreeze coming thru the vents what seems to be my problem???


heating core has been plumbed in wrong or most likely has a leak in the system, as you are smelling the antifreeze - seems to me like the antifreeze is not reaching the core, have you mistakenly plumbed the intake/out take the wrong way round?, this would cause the windows to fog up as the heat is being taken away fro the core rather than being taken into the heater core

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2 Answers

Antifreeze steam comeing through vents


Your heater core has a leak, it's like a small radiator that heats up and the blower motor blows air thru it to create heat in the car. It is leaking anti freeze into the heater box.

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99 Firebird still overheating after repairs and antifreeze


overheating is most likely a bad thermostat, but the coolant loss is a second big concern. Does the exhaust look like steam? You could have a cracked block and the coolant is leaking into the engine. Also check the oil for contamination.

Feb 16, 2010 | 1999 Pontiac Firebird

1 Answer

I have a 1993 buick lesabre and i was wanting to know if the fact that it has dirty antifreeze is that why my defroster doesnt work very well?


defrost and heat come from same place .if your heat is good but defrost is not then i think you might have defrost vent doors half stuck check them for good flow should be the same flow as to floor vents.

Jan 05, 2010 | 1993 Buick LeSabre

1 Answer

Smoke coming out vents when defrost is on and temp gauge goes up and down in 1994 Taurus


The fluctuation in the temp gage indicates a low coolant situation. The smoke you see from the defroster vent is actually antifreeze that is leaking from the heater core somewhere and as the antifreeze evaporates from the heat it causes a vapor to produce. You should smell a very sweet smell when you see the vapor. If so it is definitely antifreeze. Find the leak and fix it. Then refill your coolant system to specs and you should be good to go.

Aug 21, 2009 | 1994 Ford Taurus

1 Answer

90 ford ranger heater trouble


Heater core or one of the hoses are leaking. Low on antifreeze now so no heat.

Dec 31, 2008 | 1990 Ford Ranger SuperCab

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