I just bought this car its a 1992 400se and the A/C was working blowing cold. But the middle was not. Now It just died and It doesn't Blow at all. When I turn the the climate contro on I hear the compresor kick on but nothing is blowing in side.I check my fuses but nothing seem to be wrong with the fuses.Is there any special relays that I should be aware of? Does anyone know what may be wrong? my vin# is WDBGA42E8NA036692

 

I had the same problem on my 94 S320. Mine was a bad blower regulator. Its located on the passanger side when you open the hood it will be more towards the rear of the car where the blower motor itself is located. take out the cover and you should see a black box with a red and blue wire coming out thats the regulator. I'm not positive but i would check this.

 

Thanks I will Check this out asap.

 

blower speed regulatos go bad all the time

 

I had about the same experience. The AC would work as I could feel a small trickle of cold air coming out. If I closed all the vents except one, I could feel it better. I replaced the blower regulator and now it's coming out like my head is out the window. It works great. Found one on ebay for half what the dealer wanted. Just took 20 minutes to replace. Make sure you remove the square plug before you disconnect the blue and red wires or else you'll get a nice shock...I luckily read a post about this before I switched mine out.

 

This problem is fixed It was not the motor regulator It was the actual motor It looked like the regulator had been changed. My a/c is working again except for the fact that now its only blowing out of the sides and the top of the dash the middle vents are not blowing and it doesnt seem to make a difference when i hit the buttons on the climate control. it does change from slow to fast and from cold to hot but has no effect on the vents. Any one have an idea?

 

push the blue button.

 

i did push the blue button and its still blowing from top.

 

I actually performed a search because I have the exact same problem. It used to be intermitent and now doesn't come out the center vents at all even if I push the blue and red buttons. I'm anxious for any ideas!!!

 

Have you had the Control Unit checked out?