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Old 06-01-2002, 10:23 AM
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Question 1979 300SD-ac blowing thru defroster??????

Any info on why my ac is blowing thru the defroster?
Does the cd rom have the info to help me fix this problem? Is it something on each ac that goes bad, like a vaccum hose? The ac works well, but makes driving bad. I live in New Orleans, La, and I need my ac. Thanks
would love to get the vaccum routing to check this out.

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Old 06-01-2002, 10:56 AM
engatwork's Avatar
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,781
Do a search. You probably have a vacuum issue that you will need to troubleshoot and repair.
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Old 06-01-2002, 02:12 PM
jbaj007's Avatar
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Join Date: Jun 2001
Location: Santa Monica, CA
Posts: 2,053
vacuum actuator, vacuum switch/ valve, vacuum line are the usual suspects. Defrost is default when something glitches in climate control vacuum system. Mityvac to test. really small hands to fix. good luck.

The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)
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