C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Mar 22, 2011 | 05:40 AM
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Hello Fellow Vetteheads,
Just fired up the VETTE for the first time this winter...getting itchy.. and what to my surprise was a foggy like mist coming from the heater vents, it eventually subsided, weird. Has anyone have an idea what happened?
Thank You in Advance
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Old Mar 22, 2011 | 07:16 AM
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Was it a cloudy day? If not, then probably just moisture and ice buildup. At least that's what Tom Skillings weather page says.
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Old Mar 22, 2011 | 09:32 AM
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Your heater core is leaking.
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Old Mar 22, 2011 | 09:33 AM
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Heater core is beginning to leak or (if the car is outside) there is a windshield leak that is finding its way into that area.
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Old Mar 22, 2011 | 12:54 PM
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Originally Posted by Mike Ward
Your heater core is leaking.

Been there, done that.
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Old Mar 22, 2011 | 01:01 PM
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Other possibility, do you have A/C and was the compressor turned on and was it a cold day? Have seen evaporator cores ice up and then when they melt you get fog for a few minutes coming out of the vents.
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Old Mar 22, 2011 | 01:22 PM
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Turn on Defrost and see if the windshield gets a bit green and slimy.
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