Non typical digital climate control problem

SunnyC · 05-04-2010, 12:40 AM

Hey

I was just wondering if anyone had any thoughts on this. My E36 digital climate control doesn't seem to control vent direction anymore. For example, today i pressed the a/c button to turn on and the defrost and the cold air came right out of the front vents. The fan speed works fine. Also, when i try to adjust the vent direction when the a/c is off, it doesn't change over to my selection - feet, front vents or windshield vent.

Funny enough I popped by my climate control into my buddies car and it worked.

Basically it seems that the car is "confused". Is there any way to reset all of the cars stored computer codes/memory or reset the climate unit itself? or is there a part between the electronic control and the blower motor that needs replacement?

Please help with some feedback if possible!

Thanks Sunny

Eurostyle · 05-04-2010, 01:00 AM

The air flow is controled by several motors, flaps and cables...so if any of them are not working (stuck, broken etc...) you will have this problem! Only thing to suggest is a VERY good shop to look at it!

sparkybp · 05-04-2010, 08:33 PM

Check very carefully on both passanger and drive side and see if you notice any changes at all. Use max fan speed, Set the temperatures on each side from one extreme to the other (16 C one side 32 C) on the other. might help i dont know. Also if you popped it in your buddies car, did you grab his and try it out in your car? Is it digital control or manual btw?

doogee · 05-05-2010, 02:43 AM

Eeeek. You're going to have to pull the dash and get a good look at the heater core to see if the flaps are operating correctly.

I think there are about 4 motors

SunnyC · 05-09-2010, 07:43 AM

Does anyone know what each of the 5 wires going to the final stage resistor are supposed to do?

From my memory, I think there is a yellow, green, blue, brown, and another colour going to the clip which attaches to the final stage resistor.

I know the final stage regulates fan speed but I wasn't sure if my flaps not operating properly may have something to do with the final stage resistor. I had to change that clip because one of the wires fried so I'm thinking that when I spliced the new clip one of my connections may be faulty. I did check and everthing seems good but maybe I missed something.