When AC is turned on it only blows hot air through the windshield vent.
Jul 9, 2019 at 4:35 PM
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ASEMASTER6371
CERTIFIED EXPERT
52,796 POSTS
Good evening,
I attached a vacuum line diagram for you to view. You most likely have a vacuum line off under the hood by the tank that holds vacuum. When this happens, the system defaults to defrost and heat.