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77 vette window fogs up

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Old Mar 13, 2011 | 11:19 PM
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rob-smash77's Avatar
rob-smash77
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From: Pembroke KY
Default 77 vette window fogs up

When car warms up and heat is on my windshield fogs up. Is this a sign of my heater core going? If so anyone have any instruction or any digital manual that would help changing out the heater core if that is in fact the my problem also I have a hissing sound on the passenger side. Thanks Rob
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Old Mar 13, 2011 | 11:25 PM
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Originally Posted by rob-smash77
When car warms up and heat is on my windshield fogs up. Is this a sign of my heater core going? If so anyone have any instruction or any digital manual that would help changing out the heater core if that is in fact the my problem also I have a hissing sound on the passenger side. Thanks Rob
Yep, heater core. The hissing is probably a faulty control switch valve in the console.
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