2002 Chevy Impala Inside windshield fogging & icing up.

JIM4318

MEMBER
2002 CHEVROLET IMPALA
6 CYL
FWD
AUTOMATIC
43,000 MILES

The inside windshield fogs & freezes when cold enough. The defroster will clear the fog right away but takes longer to clear the ice film, if the defroster is turned off, the problem comes right back. I have had a few differnet answers but not happy with most. Thank you.

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Chances are you have a leaking heater core. Do you get an odor from the heater / defroster?

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Sunday, November 1st, 2009 AT 8:17 PM

JIM4318

MEMBER
4 POSTS

Thanks for your quick reply.
I had one mechanic say the heater core was bad, but if that's so--why does the heater work well & blow good heat? Aren't they the same thing? Thanks for any help.

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Sunday, November 1st, 2009 AT 8:32 PM

JIM4318

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4 POSTS

If it is a bad heater core & must be replaced. What kind of a cost estimate am I looking at? Thanks for help.

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Sunday, November 1st, 2009 AT 8:35 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Usually, a heater core will have a minor leak that will cause what you described from steam. If you smell coolant, it is most likely the heater core and it will need replaced.

Let me know if you have other questions.

Joe

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Sunday, November 1st, 2009 AT 9:17 PM

JIM4318

MEMBER
4 POSTS

Thanks Joe for your answer. I think it's probably the heater core like you said, even tho I don't smell any coolant. I am taking it to a guy I trust this Thurs. He already said it could be the heater core. Thanks for the reply.