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Old 04-24-2001, 02:43 PM
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In my 1977 300d the defroster always blows no matter what the controls are set on. Is this suposed to happen? If not how do I remedy this? All help would be greatly appriciated.

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Old 04-24-2001, 04:35 PM
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Join Date: Mar 2001
Location: NorCal
Posts: 442

Air through the upper vents is the default mode. It is very likely that you have a vacuum leak somewhere that is not allowing the actuator to close and direct air to the center vents.

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