The run to Williams was the first cool drive of the season: snug enough with heated seats and hot air blowing, but the water temperature gauge seems to know when it is cold outside.
All summer the gauge has sat at between 95c and 98c, irrespective of speed, load, air temperature or anything else. But when it is cold outside it is at between 100c and 105c, dropping back to the "summer" reading when it is over 12c outside.
This is the third winter I've had the car, and the third time it has shown this effect. I'm not concerned, it never goes above 105c, but for the life of me I can't work out WHY it does it. Any of the Aero specialists have an explanation?
It is almost as if the fan has two sensors, water temperature and external temperature....or is the fan controlled by the ECU?
suggested it is to do with the clocks going back, but i'm not buying that!
