Thread: 2005 F250 FX4 - AC Blowing through Defrost only
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Old 07-17-2008, 09:25 AM
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redford
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Your AC system is blowing defrost only because you have a vacuum leak. Defrost is the default for the system.

Your 4x4 hubs (ESOF) won't lock for the same reason, a vacuum leak. You need to find the leak, but chances are you already have (your 4x4 hubs).
 
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