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Why would the air conditioner blower on my 2001 Ford Expedition switch to defrost as I accelerate to 1800rpm?
Wiki User
∙ 16y ago
Loss of vacuum due to leak or bad vacuum caninster. Defrost is the default on this system and when vacuum drops it goes into default mode Check for leak either under hood or under dash area
Wiki User
∙ 16y ago
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buttons buttons buttons
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