E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

yet another A/C question to bore you all to death!

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Old Jun 21, 2006 | 03:48 PM
  #1  
moner's Avatar
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From: Santa Clara, CA
95' E420
yet another A/C question to bore you all to death!

ok, let start out by saying my 1995 had its entire air air conditioning system rebuilt/ replaced about 3 years ago.

ok, when i first got the car 1 1/2 years ago, my air conditioning worked really well. so, i have noticed that over time, that my A/C has blowing has gotten weaker and weaker. so, right now my A/C blowing on its high level is barely as strong as the A/C blower set at its low setting. any ideas or sugestions what may be the problem?

i did have the freon level checked just by chance that it may be low, the pressure was good, and couldnt add any freon.

Thanks...
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Old Jun 21, 2006 | 06:20 PM
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99 ML 320, 97 Porsche 993 C2S, 92 300E
Does it blow thru the defrost vent when it should blow thru the center vent? If so maybe you have a bad vacuum element.
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Old Jun 23, 2006 | 08:40 AM
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From: augusta, ga
2001 amg e55
Ac

hey ron, you describe the problem that i am having with my 2001 e55. can you provide any more detail? thanks!

Last edited by enzo ferrari; Jun 23, 2006 at 08:48 AM. Reason: typo
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Old Jun 23, 2006 | 09:35 AM
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hellah fresh's Avatar
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Was 89' 300E, Now 93' 500SEL
Dude you have to get your A/C serviced. Not alot of people know that but you need to regularly service your A/c every year. What is it doing exactly?
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Old Jun 23, 2006 | 10:53 AM
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That sounds like a problem I had with a pathfinder - the drier was clogged up and so it was not draining the condensation and it was freezing solid. It would start off working, but it would slowly get worse and worse, as if the blower were losing power. It sounded like it should be blowing but it would be just trickling out of the vents.
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Old Jun 23, 2006 | 01:08 PM
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Ron in SC's Avatar
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From: Charleston, SC
99 ML 320, 97 Porsche 993 C2S, 92 300E
Originally Posted by enzo ferrari
can you provide any more detail?
When that happens at least on a 124 that means the vacuum element for the center vent has a leak and has to be replaced. The default position is for the air to come out the defrost vents on the dash.

Not sure if it means the same on your model, plus your car seems pretty new to have a vacuum leak like that.
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Old Jun 23, 2006 | 08:08 PM
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From: augusta, ga
2001 amg e55
ac

oh, ok, i see. thanks for the reply. i popped up my problem in the e55 section as well. sounds like the actuator doo-hickee. so says local dealer. the dash will have to be removed... ughhhh
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Old Jun 23, 2006 | 09:21 PM
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From: Charleston, SC
99 ML 320, 97 Porsche 993 C2S, 92 300E
The vacuum element I'm talking about is the one on top in the photo in the link. You do not have to remove the evap case from the car to get to it, just the dash. I had to remove the case to install new evaporator and at the same time I went ahead and replaced all 6 vacuum elements including one you can not see because it's inside the case.


http://forums.rennlist.com/upload/evapdone_002.jpg
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Old Jun 27, 2006 | 11:56 AM
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From: Richmond, Va.
1991 300E
you may have a short somewhere in your wiring. I had the smae problem you described originally. My blower would run the same slow speed no matter what fan setting it was on. It finally quit all together. Turned out it blew out the big fuse by the drivers side hood hinge. I replaced it and it hasn't acted up again.
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