andrew strasfogel wrote:
BLOWER QUESTION:
Using the AC on my 1983 300td, the low blower setting is almost
imperceptible (though it does work). I don't get enough cooling so
always have to switch the fan back to automatic, then I get too cold
again. Is this wimpy low setting on the blower motor normal? It is
working, but the output is pathetic...
If the temp becomes too cold with the blower control in the automatic
mode, it's PROBABLY because the temp controller is working improperly -
NOT because the blower control is not working properly.
This MIGHT be because the tube from the blower to the in cabin temp
sensor is not drawing sufficient air across the sensor. The tube OFTEN
rots or becomes disconnected and this OR much less frequently if the
sensor degenerates, can result in erratic or unexpected
temperature/blower motor operation.
I'm sure it IS possible that the low speed setting to the blower to be
wimpy, but that shouldn't result in temp output with the blower control
in the automatic mode being too cold.
Diagnosing this system is tedious, but NOT particularly difficult IF you
follow the entire troubleshooting procedure outlined in the factory
manual (not quite as complex as the systems incorporated into later 126s
in the mid '85 and in the 201/124s).
Marshall
--
Marshall Booth (who doesn't respond to unsigned questions)
"der Dieseling Doktor" [EMAIL PROTECTED]
'87 300TD 181Kmi,'87 190D 2.5 199Kmi, '84 190D 2.2 227Kmi, '85 190D 2.0
159Kmi, '87 190D 2.5 turbo 234kmi
Diesel Technical Advisor MBCA, member GWSection
http://www.dhc.net/~pmhack/mercedes/mbooth1.htm
