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U have a Vaccum leak @ your resivoir for all your ac & heating controls.Sometimes a cracked Vaccume line from the Engine Intake Manifold 2 the AC Canister will do the same.Some cars have a container that looks like a fruit juice can mounted under the hood Ford/Chevy/Dodge etc ALL will do the samething because of a VACCUME leak.

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∙ 2015-07-15 19:46:24
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Q: How do you stop a '92 Plymouth van from going to defrost when the air vents are on during acceleration?
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