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Old 01-07-2008, 07:46 PM   #9
Phuloi68
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Join Date: Dec 2003
Location: Valparaiso, In
Posts: 1,114
Re: Heater and Vent Work, But not Defrost?

It's either a vacuum problem(most likely) or the little white plastic part on the rod operating the flapper door is broke(common).
Look at the tee fitting on top of intake right behind carb. Seems like those little rubber hoses on that become brittle and crack.
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