Vehicle: 1997 S600 - Bentley Turbo R (black/black)
Location: Madison, WI
Posts: 311
Oh boy, Air flow problem (A/C,heat)
The air in my car suddenly stopped. There is no air (cold or hot)comming out of the vents, even when i have the thing on auto (full blast).
My car is a 97 S500. I have heard that 96 and older models had A/C problems, and they are VERY expensive to fix. I hope this is not the issue in this case.
Since no air is comming out, i am assuming its a fan or blower issue, or maybe even a fuse..
Vehicle: 1997 S600 - Bentley Turbo R (black/black)
Location: Madison, WI
Posts: 311
RE: Oh boy, Air flow problem (A/C,heat)
I cant hear the blower working or blowing.
I hear a slight click sometimes, when i hit the EC botton, which i assume its economy. I dont hear the blower blowing air( like when i put it on high or auto), if thats what your asking.
Someone at another mercedes site, suggested that it could be a little item in the blower "regulator" that mulfunctions.
I am dealing with exactly the same thing. When you push buttons you hear the vacuum adjustments and the vents adjusting in the dash.
I knew I had a problem when some days the climate control would be working and then stop. I could feel cold air trickling out of the vents, but with no blower behind it. It got real bad when it rained and I had no defroster. So two weeks ago I took it to the Mercedes dealer and had them diagnose it. The told me I needed a blower motor and a regulator. They also said I could not replace one or the other, that it had to be replaced together because something had changed and the parts would not function otherwise. (They lied about that). So I told him to fix it. $900.00 for the blower, $250.00 for the regulator and $250.00 labor. $1400.00 would have been the bill. The good news for me was they did not have the parts so I got out of there for $92.00 bill. Went home and started researching. Found this place http://www.autopartsauthority.com/ with OEM blower and regulator for $555.00. Decided to buy the motor and regulator separate in case this was not the problem. I installed the new items and had the same problem. I kept the new blower because the old one was rough looking, and I sent back the new regulator. I did this because there was a fairly new replacement OEM regulator installed in my car. This means the dealer was wrong, and after $1400.00 they would have said they found something else it could be.
By the way, there is a test you can run. Turn the car off. Turn your drivers climate control all the way to hot and the passenger all the way to cold until they click. Start the car and hit the auto button. Within 20 seconds press and hold rest and 0 for a few seconds and you will then hear the system run through tests which should fire up your blower to the defroster then front panel etc. You have to turn off the car to stop the test. It this happens then you know your blower works, you just need to find out why it is not coming on.
You can find all this at http://www.alldatadiy.com/ for an annual fee.
So then I decided to replace the climate control unit. I did this 2 days ago. This did not fix it either. $392.00 for that part ($900.00 dealer). Now I am thinking it is a sensor, I am just trying to figure out which one. What confused me is, I was thinking the motor or climate control must be bad if I cannot put on the defroster manually, but I was wrong to use normal car logic with a Mercedes I will post once I figure this out. If anyone else has any ideas, I would appreciate any info.
Vehicle: 1997 S600 - Bentley Turbo R (black/black)
Location: Madison, WI
Posts: 311
RE: Oh boy, Air flow problem (A/C,heat)
Well:
Mine climate control, did not blow cold or hot air. Even at max auto...nothing...I could feel a very slight coldness or hotness comming out depending on the temperature...
Anyhow, from what i read, i was guessing it would be the blower regulator. I took it to my mechanic....and he said he found that the blower motor fan was stuck and that there was some rusting in that area...He sprayed some oil to lubricate that area, and as soon as he touched it...it started working again...... That is good...save me alot of $$$ for now....but he said he thinks it will need a blower motor in the future....
So for now, it was a simple fix, lubricating the area of the fan and manually activating it to spin again..
Then that is a simple fix. You can get the motor for $160.00 from http://www.autopartsauthority.com/ and let your mechanic put it in. I wish mine were that simple[:)]
I had a very similar problem in my '93 300SE about 4 or 5 months ago. If you search the forums, you may be able to find the thread.
Anyways, with my problem, I found that by turning on many electrical components (such as rear defrost, seat warmers, high beams, radio, etc.) the fans would all of a sudden kick in. Very weird. I put a voltmeter on the battery and found that whenever the voltage exceeded 14.4V, then the fans would die. If the voltage was below (such as when I had the power drain by running the electrical components) then the fans would all be running.
Anyways, this was very weird and I spent like a month trying to figure out what it was. I didn't want to buy the blower regulator until I was certain tht was the problem.
Anyways, to make a long story short, I ended up buying the BEHR blower regulator (an updated regutor from the original that has a larger and much-needed heat sink). I paid around $180US for it off of Steve Brotherton at Continental Imports in Florida. He had the best price, and he is VERY knowledgeable and VERY nice. I bought the part off of him and he shipped it to me in Ontario Canada.
Anyways, I replaced the regulator myself (instruction can be found on BenzWorld somewhere, it is very VERY easy!) and the problem was solved!! I have been running it for about 5 months without having that problem occur again :)
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