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Ac blend door closes when engine is under load on 1999 Dodge 1500 Ram?
Wiki User
∙ 12y ago
the blend door control motor has a small plastic collar in it that likely has cracked, its it on the left floor board toward the tranny hump 3 Phillips screws, you will need a stubby driver, pull that out and you will find the collar, replace it with the aftermarket metal version
If the airflow ends up at the defrost position, thent he vaccum check valve under the hood has failed. It is along the pass side of the fuel rail.
Wiki User
∙ 12y ago
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