electric cooling fan staying on?

[Tman]

Hi guys,

just had my 2.4ltr (2001 plate) serviced by an independent on the weekend.

he said the only thing he found problem wise was that the secondary cooling fan after about 10 mins or so was comming on and then staying on constantly and not switching off (unless the ignition is turned off). He had hooked the car up to the VAG tool but said the car was comming back clean - no fault codes comming back at all.

the car temp gauge is running at 90 as it always has.

I have got a brake fluid change at an audi dealer this saturday (£49!!) my independent suggested i get them to see if they can find fault but with audi labour at £104/hour im bit unwilling to

so a few questions for you guys:

1. Any ideas??
2. Apart from perhaps an increase in petrol consumption ok to continue as is?