Question about 1999 Chevrolet Silverado 1500

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Smell coolant when heater is turned on, little heat

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Most likely you have a small leak in your heater core. Feel the carpet on the front floor on the passenger side.
I'm guessing you need a new heater core which is a big job on some cars.

Posted on Mar 01, 2009

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you need to replace the heater core

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1994 Caprice LS. Little to NO heat.


It will be the heater core. If you can smell it inside the car and it's steaming up the windows the core will need to be replaced. Remove the heater core housing and check to make sure its leaking from the core itself. You might get lucky and have a leak from the hoses running to core instead. Hope that helped.

Nov 17, 2011 | 1994 Chevrolet Caprice Classic

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Heater is not working. No heat coming from it.


if u can smell coolant burning when you try to turn on the heat, it would be the heater core. i would first check the coolant level and change the thermostat. if coolant is full and clean with a new thermostat u have a bad heater core

Jun 15, 2011 | 1999 Ford Taurus

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While driving my 95 explorer i noticed the heater wasnt getting hot its luke warm and when i turn on the defroster i start to smell anti freeze and all of the windows fog up


no heat is probably low coolant or bad thermostat,although you have fog and smell ! the heating and cooling systems are closed systems the only way the windows fog is the coolant is hot and steams inside the car due to some leak inside the heater core box. as well as the smell being present. Now it is possible that a little leak has occured where the coolant supply or return line connects to the heater core and is running into the car which is running onto the core and creating steam and smell. hopefully it is a easy clamp tighten fix for you.

Jan 13, 2011 | 1995 Ford Explorer

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Front heater not heating properly have added coolant also can smell coolant at times rear heater was not working but now it began to heat


It stopped heating because it was low on coolant and the hot coolant flowing through the heater core is what gives you heat. As for the smell 9 times out of 10 if you are smelling the sweet smell of anti-freeze in the vehicle it is the heater core. see if the passenger floorboard is wet or damp. If it is , the heater core has failed.

Dec 04, 2009 | 2004 Kia Sedona

1 Answer

Coolant smell inside cab when you turn on car/heat


Likely you are in the beginning stage of a heater core leak. at this point, you may be able to temporarily solve the problem by using a good system sealer (I'm partial to the kind that comes as a silver powder) Since we don't actually know the condition of the core, temporary may mean a week or several years, but replacement is expensive and time consuming so I'd definitely give it a try.

Oct 26, 2009 | 1999 GMC Sierra

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Strange smell when heat is on heat works fine just strange smell also have to add coolant about every three months


sounds like you got a heater core leak,the heater core is what the coolant flows thru into your heater box in your dash to allow you to have heat,sounds like the core is leaking,by the smell and the low coolant i would say it is leaking, youll need to replace it before it blows out, you dont need 2 gallon of 200 degree coolant flowing into your car,,,

Oct 07, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Smell coolant when heater is turned on, has little heat.


Hi, you are experiencing a leak in the heater core itself. i suggest shutting the core valve and, running a pressure test to find the drop point.

Mar 01, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Smell coolant when heater is turn on...


the heater core inside the dash is leaking, it may get worse and coolant will start to drip on the floor out of the heating outlet

Dec 17, 2008 | 2000 Chevrolet Blazer

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