fan running continously 2.5 v6 tdi... thermostat or what ??

[dell45]

Hi there newbie here - could do with some help with the a4 i have just bought......
Fan comes on immediatly at startup and never switches off (not aircon fan). It is not a viscous fan, it is an electric fan.
The Temp on gauge stays about 60 unless on a drive it goes up to 65. The climate control codes for 49 (coolant temp)say 60 degrees and 51 (engine temp)says 90.
I have just replaced the ect sensor and it made no difference at all - could it be the fan switch or relay sticking, or could it just be the trusty thermostat ???
There are no warning lights

In advance , thanks for all input

[Crasher]

Year and engine code?

[dell45]

apologies, it is a 1999, engine code AFB
cheers

[Crasher]

So you mean the smaller fan on the right hand side of the radiator, not the larger viscous coupled fan?

[dell45]

So you mean the smaller fan on the right hand side of the radiator, not the larger viscous coupled fan?

Damn i am stoopid - it is the viscous coupling fan.....
does it mean the fan is goosed ??

[Crasher]

This set up changes in 99 according to chassis number, is your chassis number before wauzzz8DzXN199999 or after?

[Crasher]

No, the fan should windmill all the time, you will be in no doubt should it kick in, the roar and air rush from the bay is unmistakable!

[dell45]

chassis number is
this forum rocks !!! thanks for all the help mate

[dell45]

puts my mind to rest over fan issue then ..... cool
do you think it is the thermostat then ?

[Crasher]

No problem, I don’t need the chassis number now as I don’t think I need to look up the relay numbers for you to start pulling them out. Delete your chassis number now.