Heating Problems
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Junior User
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Heating Problems
I have a 1978 F-250 and there is an issue with the heat. When I turn on the heat it blows warm air yet there is a fog that comes through the a/c vents that smells like antifreeze. Is the heater core bad or is it something else. Any one else have this problem.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
The passenger side floorboard/floor may also be damp if the leak has been occuring for several months.
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Junior User
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It has been happening for a while now but It doesnt seem to be leaking. Ive had one leak before on a 73 F-100 and it was quite wet. I cant seem to find where this one is leaking. Any other options or is it definately the heater core.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
D-i-t-t-o!
Anti-Freeze is leaking into the heater plenum chamber where the outside air passes thru after first passing thru the heater core on its way to the vents or defroster ducts.
The air picks up moisture from the Anti-Freeze, deposits it on your windshield as fog.
Anti-Freeze is leaking into the heater plenum chamber where the outside air passes thru after first passing thru the heater core on its way to the vents or defroster ducts.
The air picks up moisture from the Anti-Freeze, deposits it on your windshield as fog.
