Spider on the road
again after winter
Join Date: Jan 2013
The small fan motor in the temperature sensor unit of the climate control has also started to play up after I have pulled the Spider out its winter hibernation.
The fan motor wouldn't start unless you pushed it by hand.
Therefore I disassembled the sensor unit to see how the fan motor was build.
The fan motor is built as a small stepper motor controlled by an electronic circuit on the PWB at the wire end of the sensor unit.
The control circuit appeared to be quite simple and after some measurements I found it to be functional.
After having disassembled the unit completely I could pull off the fan together with the shaft and I found that the start problem was caused by a dry bearing so after I put a very tiny drop of oil on the shaft and assembled the unit, the fan motor now starts again every time.
The unit is not easy to disassemble, it is required to de-solder the wires from the temperature sender, but it is possible.