Thread: 1980 300 SD A/C problem
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Old 07-08-1999, 11:53 PM
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Bill Wood Bill Wood is offline
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Join Date: Mar 1999
Location: Johns Creek, GA, USA
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Scott-
Use the search function in the upper right hand corner of this page. Search for the words "center vent". You'll find about 12 posts regarding this topic. The problem seems to be caused usually by faulty vacuum elements or insufficient vacuum. I'm not a tech but, maybe you will find something that helps in those posts.

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