Question about 1999 Ford Super Duty F 450

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99 F-450 7.3. Heat only in A/C vent. All other settings A/C works but heat is outside air. Truck came from public works in Southern Califorina.

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Might be a stuck air control flap. hope this helps!

Posted on Nov 06, 2010

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Posted on Jan 02, 2017

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1 Answer

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