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How to stop leak in heater core ?

Smell antifreeze and windows fog up.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

Scorpedo
  • 111 Answers

SOURCE: Heater core or blower motor?

Sounds like your blower motor , you heater core is a non mechanical part and if it were the issue you are correct in thinking you would see fluid on the floor or mist on the windshield.

Posted on Dec 17, 2008

dgjtex
  • 405 Answers

SOURCE: antifreeze smell and smoke coming out of vents

This is definitely a heater core issue, but I might also suggest one of the many over the counter cures first before replacing it, the heater core is not a very expensive part but quite a chore to replace.

Posted on Dec 28, 2008

  • 3 Answers

SOURCE: windows fog up,small anti-freeze smell

try looking at the air filters. MIne was totally clogged with ****. No air circulaton equals foggy windows

Posted on Dec 29, 2008

  • 2920 Answers

SOURCE: Brief antifreeze smell in Jeep

you are at the beginning stages of the heater core going out on you..just because theres no moisture inside doesent necessarily mean the heater core is still ok it just means its going to start leaking on the outside more than likely

Posted on Jan 29, 2009

  • 106 Answers

SOURCE: Heater Core Leaking

you could quick fix! but you will have no heat, 1st under the hood, look at the back of motor, follow all you're radiator hoses, take two hoses off the heater core stick a pipe that is big enough then clamp the pipe down. to both sides of hoses to the pipe you will eventually have to replace heater core!!

Posted on Mar 24, 2009

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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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My ford 1997 F-150 4.6L has a antifreeze smell in the cab when it is running, think it might be the heatercore?


yes it sounds like it might be the heater core when your heater core goes bad it leaks and seeing that it is in the cab it will have that smell usually when it leaks your floors will be wet from the leak. bypass the heater core unitl you can get it fixed to prevent any electrical problems

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Is antifreeze leaking in your car under clove box If so it may be your heater core

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Leaking antifreeze fog on windows


either your heater core has a leak or one of the supply hoses has a leak which is running into the car where the hose clamps to the heater core inlet or outlet tube. hopefully its just a clamp tighten fix.

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My widows fog up heavy on the inside when the defrost heats up


This is usually a good indication of a small leak in the heater core. Does it also smell really sweet?

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I smell antifreeze and my windows fog up when the heat is on or off what could that be?


The only part that has coolant running through it under the dash, is the heater core, when it goes bad, you will smell coolant and the window will fog up, leaking heater core, replace it be for it start's to over heat your engine and cause more problem's in the long run.

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Heater immediately fogs all windows and there is a sweet odor in the cab of 2003 Buick Rendezvous, defroster works fine, but will not clear the windows after heat is put on


Sounds like a possible heater core failure(hole in it) the smell indicates to me the coolant(anti-freeze) is leaking into the passenger compartment.
Check the carpet in front of the front passenger seat for moisture, this would confirm heater core leak.
Good luck !

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2001 jeep cherokee- had the heater core replaced in Feb. 2008, when you turn on heater barely any air, when you use defrost a snell and the windows fog up. When you turn off car sounds like ******* comes...


Sounds to me like the heater core is leaking again. If you're smelling antifreeze and the window fogs up then you're getting coolant into the heating system. Most likely cause is leaking hose to heater core or the heater core it's self.

Dec 05, 2009 | 2001 Jeep Grand Cherokee

1 Answer

Heater works but defrost fills inside with fog.


your heater core has probably sprung a leak.does the fog smell kinda sweet?....check the floor in the front where the floor mats are for moisture or even puddles of antifreeze.(the replacement of a heater core can be very expensive as the entire dash usually needs to be removed to access the heater core)also look under the engine near the firewall for antifreeze drips.

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1 Answer

2002 Diamnte does not defrost, smells like antifreeze


If you are smelling antifreeze then there is going to be a leak.
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Good Luck

Nov 23, 2008 | 2002 Mitsubishi Diamante

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