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  #1  
Old 11-02-2007, 03:50 PM
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Location: Toronto, Ontario, Canada
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How does my heating/cooling system work?

I have an 85 Euro 300TDT with AC. I think the only difference with a North American car is I have dual controls for driver and nagging wife. The wife is complaining that there is dust coming out of the vents, most noticeably through the defrost vent, and the black dust accumulates on the dashboard. So what I want to do is try to clean the vents somehow to lessen the dust coming out of them. What I was thinking is blow some compressed air through the system and try to blow it clean. I tried dropping the blower motor and blowing some air in but it didn't seem to be coming out anywhere?

Short of taking the whole dash apart, is there an easy way to clean the system? Are there parts in there with foam on them that are disintegrating? Where is the fresh air brought into the system?

Thanks

Peter
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  #2  
Old 11-02-2007, 04:20 PM
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vacuum

peter--did you blow the compressed air while the vents were open? my understanding is that the vacuum system will close the vents when the car is off--i could be wrong there, tho... -noah
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1980 300D (non-turbo, 421k miles)
1984 300TD (turbo, 305k miles)
1985 Vanagon (170k miles)
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  #3  
Old 11-03-2007, 12:28 PM
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The system has a black foam on the panels. It is disintegrating. A bit of a pain but not a problem. Try blowing the system out with a compressor. It might help.

Dava
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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car
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  #4  
Old 11-03-2007, 02:24 PM
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Thanks for the replies

Dava, I saw your pictures of when you took your dash apart, so I guess you are the guy to ask. This foam you mention, where is it and can I get at it without taking the dash apart?

Thanks

Peter
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Old 11-03-2007, 02:24 PM
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