I have 2003 f-150 whenever I turn the a/c on it shoots out the vents then straight to the defrost.when I turn the a/c off air comes through the vents fine.


Asked by Jun 10, 2015 at 10:08 AM about the 2003 Ford F-150 Lariat Crew Cab SB

Question type: Maintenance & Repair

4 Answers

Stanford Baddley

Sounds like a blend door motor/actuator problem.

Tom Demyan

Sounds like a vacuum hose issue. If there is a crack/leak in the system, all air is diverted to the defrost vent. Get under the hood along the firewall and check your vacuum hoses.

1 out of 1 people think this is helpful.
Tom Demyan

Look for the small vacuum line routed near the battery that goes from the intake through the firewall.

Stanford Baddley

Now that you said that, I do agree that your response sounds correct. Kudos to you Tom.

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