1999 Oldsmobile Cutlass Logo
Posted on Dec 17, 2010
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Windows fogging heater core replacement / location

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Anonymous

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  • Expert 172 Answers
  • Posted on Dec 17, 2010
Anonymous
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Joined: Dec 05, 2010
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  1. Disconnect the negative battery cable and drain the cooling system.
  2. Disconnect the heater hoses from the heater core inlet and outlet connections in the engine compartment.
  3. Allowing residual coolant from the heater core to drain. Cap the openings.
  4. Working inside the vehicle, remove the lower instrument panel sound insulator and look for where the air blows to your feet.
  5. Remove the heater floor outlet duct screws or clips and remove the duct.
  6. Remove the heater core cover by removing the attaching screws and clips.
  7. Remove the heater core cover.
  8. Remove the heater core retainers and remove the heater core
  9. Reverse order to install leaving the covers off at first then connect all hoses, refill and check for leaks before putting covers back.

5 Related Answers

Anonymous

  • 33 Answers
  • Posted on Feb 15, 2009

SOURCE: how do i fix heater core on a 2006 chrysler 300

If you're getting hot air, it's not the heater core.

Windows fog up because the humidity level inside the vehicle increases while the temperature of the windows decreases to a point where the dew point of the air is higher than the temperature of the glass. When this happens, moisture from the air condenses onto the glass. When you breath out, you increase the humidity of the air in the car because of the moisture in your breath.

The key for defrost to work isn't necessarily heat, it's more important to dry the air. There are two ways of doing this:

1.) Make sure you have the air recirculation turned off. This feature causes your car to recirculate air from inside the car through the air ducts. In the summer when it's hot and humid outside, this is what you want. However in the winter when the air is dry, you want to bringing fresh dry air from outside to replace the humid air inside the car.

2.) Turn on the A/C compressor. This will cool the air before it passes through the heater core. Cooling air removes moisture. This is why your car drips water from underneath in the summertime when you run the A/C. It is literally removing moisture from the air.

However, if your heater isn't working (blowing cold air even when on the warmest setting), then you may have a different problem.

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Anonymous

  • 3 Answers
  • Posted on Dec 29, 2008

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

blubanshee

Corey Malone

  • 48 Answers
  • Posted on May 27, 2009

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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Anonymous

  • 1118 Answers
  • Posted on Oct 06, 2009

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.

Donald B Stoll

  • 597 Answers
  • Posted on Dec 05, 2009

SOURCE: 2001 jeep cherokee- had the heater core replaced

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.

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If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_00678fd4800d19c5

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