Grand Marquis has a problem with the vent
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Grand Marquis has a problem with the vent
My Grand Marquis has a problem with the vent system it. It will cycle between the vent positions continuously. It will stay on one position for anywhere’s from 5 seconds to a couple of minutes. It seems to like the defrost position the best and stays there longer. Does anybody have a clue as to what might cause this?
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