A/C moves from panel to defrost and back under acceleration
Fleet Owner
Joined: Apr 2008
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It is cause by either a crack in the vacuum hose running from the intake manifold to the vacuum reservoir, or the check valve in that same vacuum line is no good.
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fordmustangfan67
1968-Present E-Series Van/Cutaway/Chassis
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Jul 1, 2012 05:17 PM
