AC Problem - Low Flow in Center Vents / Minimal Flow in Rear
I have a W210 2000 Wagon. Although I raise my AC control to its maximum level, the flow of cool air is low in the center vents in the front seats and is negigible in the rear vents. However, the temperature of the air is cold. I took the car to the shop and the pressure in the coolant system seems to be fine.
From what I have read elsewhere in this forum, the problem might be due to a failed blower regulator. Does anybody have any insight to this issue? Thanks in advance
RE: AC Problem - Low Flow in Center Vents / Minimal Flow in Rear
Sounds like a classic symptom for a failed Blower Motor Regulator. I have the exact same problem.
The HVAC seems to work fine except the airflow is very low - with a slow to medium fan at best -- no matter what the display seems to indicate it's doing.
Search for Raphael Grullion's post on this - it explains how to ID the problem and replace the Regulator yourself if you wish. It's here in W210.
Basically, it's under the dash on the passenger side next to the charcoal filters. Remove the 4 screws holding the plate and the blower and regulator can drop down. In the W210, the regulator is sold with the blower as an expensive complete assembly. Buy the regulator for the W124 and solder it in place of your old unit and save a few $$. It has a heat sink and thermal paste that are important to use and apply properly.
Autohaus Arizona ( advertiser here) sells 2 types of these regulators, a french and a german one. Buy the one that matches your unit, or default to german if you have the choice -- about $140
RE: AC Problem - Low Flow in Center Vents / Minimal Flow in Rear
Today I replaced the blower motor regulator in my 96. The part can be bought from Arizona Autohaus for $168 or the more expensive $198.
Just to add a side note: The cheaper regulator has a metal plate that directly mounts onto the blower itself. This plate (in my case) was too large and consiquently I had to modify the blower motor's metal housing to get the correct fit. This may not be your same problem but If so be prepaired to do some grinding.
Assuming that you have the right tools including a torq's socket, wire cutters and crimpers then the rest of the job was cake. Give yourself about an hour and maybe a good stretch (to get under the dash)[:D] Good Luck guys
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