Hi,

I have an '85 300D Turbo with 227,000 miles.

Since buying the car, the A/C never worked. However, the push-button fan controls have recently become less and less responsive.

When the car is running, pushing the fan buttons on the console appear to do nothing. Strangely, when the engine is off but the ignition is on, all the fan controls work great. I can switch between Econ/Normal/Bi-Level/Defrost settings and Max/Min/Auto fan speeds. Once I start the car, the fan shuts off and I can't operate anything.

Occaisionally, the fan stays on and the controls keep working.

Stranger still, while driving, the fan can suddenly jolt to life for no apparent reason. It tends to work for about 10-15mins, and then dies again.

What needs to be fixed or replaced here? I have re-soldered the push-button control unit, replaced the tube running to the Temperature Control sensor, and removed the blower fan to fix the brushes.

Please help,

nhsu06