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Old 02-16-2001, 01:21 AM
spjohns1
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My ac blower in my 1985 300D just recently quit. All fuses checked out good, but there is no power to the motor. I do have power to the fan switches. I would like to know if there are any tests that I can do to try to narrow down the list of culprits, so I do not have to chase it down with parts. I cannot drive the car until it gets fixed.
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  #2  
Old 02-17-2001, 01:49 AM
MikeTangas's Avatar
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Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
Scott,

After talking to you at the office today, I think the following links will get you started in the right direction. Cover info on the monovalve and the blower relay.

300TE blower motor

Chilly heater in 1983 300TD

Infamous Monovalve-BURRRRR

Not much, but it's a start.

BTW: Welcome to the best online Tech forum and Parts house going.

[Edited by MikeTangas on 02-17-2001 at 12:55 AM]
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'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

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Old 02-17-2001, 03:30 AM
spjohns1
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Mike,

Thanks for the tip. The diaphram was torn, so i think that will fix the no heat problem. BUT, I still do not have a blower fan. Sounds like from what I read in those links, that the push button unit is the most likely culprit. If anybody else has any other tips before I fork over the bucks for a new unit, I would sure appreciate it!
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Old 02-17-2001, 12:24 PM
MikeTangas's Avatar
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Scott,

Have you checked all the fuses? Not just the ones in the fuse block, but the others in the separate boxes on the firewall. Not exactly certain on the 123, but look on the firewall, right side and see if you have several black boxes. In these boxes are more fuses, just left the top of the box off (one has a screw holding it shut) they each hold two fuses. Two boxes are for the windows, one may be for the radio, and the last could be for the blower (it is for the A/C blower on the 280 [separate blowers A/C and heat for me]).

Could be the brushes are bad, have read about folks simply replacing them. Could be the blower just needs a little push to get started again. Lots of free or almost free things to try first.
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Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.
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