I have a 230CE w124 '88, with a single A/C aux fan.
The fan used to run at high speed now and then, but has never operated at a lower speed.

Now, should the fan run at low speed all the time as long as the A/C button is pushed?

And, secondly, where do I start searching for the fault?
I have heard people talk about a low speed resistor?

Thanks!

Anders Eklo - Norway.