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Coolant fogging up windshield do i need to replace heater core

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  • Cars & Trucks Master
  • 15,704 Answers

Usually yes, but screens will fog up this weather without the heater core leaking. Mine fogged up last night and hasn't done this year yet. It was snowing. Usually, there is coolant on the floor and the carpet gets wet. The heater cores are made of plastic and they can crack though.

To Defog, blow COLD air at the screen.

Posted on Dec 23, 2016

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  • Cars & Trucks Master
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Surely so.

Posted on Dec 23, 2016

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Posted on Jan 02, 2017

emissionwiz
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SOURCE: windows fog up,small anti-freeze smell

The early sign of a heater core leak is the smell of coolant, the reason is that only vapor is leaking now, it will gradually get worse in most cases and coolant will start comming out the heater box condensation drain.

Posted on Dec 21, 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

blubanshee
  • 48 Answers

SOURCE: heater core replacement

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You have to remove the entire front of the heater case to change thecore. This usually looks a lot easier in print than it actually IS.Theinstructions say to remove the lower part of the dash for access; usually youdon't have to remove the entire dash for this type of service, althoughsometimes it makes things easier if you loosen and remove any components notmentioned in the procedure that are in your way.
This kind of repair can be frustrating, as it involves working in tightplaces and with 1/4 drive extensions and universal sockets to get all thefasteners out, but it IS possible.Here is what I have for the factoryprocedure. I don't know of any shortcuts to make the process easier; if you can'tget it off, perhaps removing the dash completely for more room would be aviable option...


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Posted on May 27, 2009

  • 1118 Answers

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

Yes you do need a heater core, if not replaced it will only get worse.

Posted on Oct 06, 2009

coupedeville
  • 97 Answers

SOURCE: Need coolant hose diagram for 1992 Chevy Cavalier

it makes no difference as long as you have coolant going it and out

Posted on Nov 13, 2009

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Why my window is fogging whe i turn the heater ?? i recently bought my toyota carina 3 model 1994 but the window is fogging , what should i do?


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Windows fog up,small anti-freeze smell


The early sign of a heater core leak is the smell of coolant, the reason is that only vapor is leaking now, it will gradually get worse in most cases and coolant will start comming out the heater box condensation drain.

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