Heater controls works sometimes. - Mercedes-Benz Forum

 
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post #1 of 1 (permalink) Old 12-28-2008, 09:01 AM Thread Starter
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Date registered: Dec 2008
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Heater controls works sometimes.

Hi all,
Strange issue that perhaps someone can figure out.
2002 SLK 230

When I start the car, the heater does one of two things:
It might work in the sense that I have use of controls for fans, temp and the back light to the controls work.

More common is the fact that the fans and heat come on but I have no control. The back lights do not come on, The fan controls DO NOT work! I can not turn of the fan at all. The EC button and recirculate buttons do not work. The only button that does work is the rear defogger. After some time, the back light come on and then I have control of the fan.

I am guessing an electrical problem as it seems related to the back lights of the controls. Either a lose connection or faulty control unit.

So TWO QUESTIONS:

First, does the fan control work on an electric system or mechnical wire
second, any thoughts about what is happening and how to repair?

Thanks
kidkar is offline  
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