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Heater Control Valve Leaking Onto Manifold Causing My Windows To Fog Up On Inside?

My car windows are fogging up on the inside and i can smell anti-freeze inside the cab. I thought i might have leaky heater core but i see no signs of leakage from the core. I was inspecting under the hood and i noticed the heater control valve is leaking anti-freeze when pressurized and leaking onto the manifold. Can that be turning into steam and coming into the heater intake through my defrosters and causing my windows to fog up and the sweet anti-freeze smell. I don't see anything else. It sounds logical to me!??

Thanks

2 Answers

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  • 1 decade ago
    Favorite Answer

    the symptoms you describe are characteristic of a bad heater core . fix that heater control valve issue first and if that does not help than it is the heater core

  • 1 decade ago

    Yes through the ventilation system. Test again after you replace the Valve.

    Source(s): 38 Years Exp.
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