I would bet your vacuum actuators are either not connected or not
actuating to open the doors to allow air to get to wherever it is
commanded to go. I only fooled with them on the TD, it was not easy to
get at them to replace them, but doable with suitable contortions and
imprecations. First thing to do would be vacuum tests on them from the
line you can get at most easily, and see if you can get the doors to
open by pumping or sucking on the line.
-_FT
On 11/20/16 5:46 PM, Ralph,'84TD via Mercedes wrote:
The fan sounds like it is running well. The speed can be varied but very
little or nil air is coming out of the vents. If I am driving, and open the
roof vent, the air comes out thru the vents nicely. When I come to a stop, no
air is coming out, but the fan is running and sounds like it is blowing air. I
tried running it in various modes, but the flow is no different, either in the
heat mode or the A/C mode.Ralph
On Sunday, November 20, 2016 12:05 PM, Curley McLain via Mercedes
<mercedes@okiebenz.com> wrote:
Sounds like a flap not opening IF the fan sounds like it is running at
speed.
IF the fan is running slow, it could be the aspirator hose disintegrated
or was knocked out of place while they were monkeying with the blower
fan. The aspirator system determines how fast the blower runs.
ACC sucks!
Dan Penoff via Mercedes <mailto:mercedes@okiebenz.com>
November 20, 2016 at 10:52 AM
Ralph,
Are you getting air flow form the appropriate vents in each mode? I
ask because that would pin the issue on the fan, as flow would be low
regardless of the mode. In that case I would be looking at the fan.
If the flow varies depending on which mode the ACC is in, you’ve got
an issue with a vacuum actuator and a door or flap not opening all the
way.
Dan
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Ralph,'84TD via Mercedes <mailto:mercedes@okiebenz.com>
November 20, 2016 at 9:54 AM
I had the brushes changed in my heater/a/c fan motor. Since
replacing, although the fan motor runs good, there is very little air
coming into the interior of the car. The fan makes a sound as though
there is something blocking the air flow. It is so low that the A/C
does not keep the car cool. Could the motor have been installed
incorrectly thereby blocking the flow into the car?
Ralph, '87 300 SDL
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--
--FT
Winston Churchill:
“Never give in--never, never, never, never, in nothing great or small, large or
petty,
never give in except to convictions of honor and good sense.
Never yield to force; never yield to the apparently overwhelming might of the
enemy.”
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