I noticed the other day that the radiator cooling fan keeps speeding up and slowing down when the car is in idle at the end of a journey before I switch off the engine. It seems to start doing this when the engine reaches running temperature. It appears to be putting a large strain on the electrics as the headlights become noticeably dimmer when the fan speeds up. It stops when I switch off. Even if I allow the car to rest for about 15 - 20 minutes to allow the engine to cool before starting it again, the fan starts to do the same thing. The only time I have ever noticed this fan in the past was when it kicked in for a minute or so after switching off the engine in the summer when it was very hot.
- posted
15 years ago