Hi All,
Just to muddy the waters a little!
I don't know from what year or model, but later versions, certainly 2002 on the 3.2 sampler fans are not fitted.
I know this because like some of you I couldn't see any ciggy smoke drawn through the small hole in facia panel and thought I had a fault.
I took the whole gubbins apart, even the assembly that is behind all the push buttons. There was no fan, nor any type of arrangement to hold or fix a fan to. definately had not ever been one, even though there is still a small hole in the facia
I don't know where the later system senses the interior temperature, but I can only comment that my climate control is spot on. it reacts immediately if when you stop and open a door to let someone out by speeding up the fan and increasing the heat, then as soon as temp is up again it powers down again.
It would be interesting to know just when VX ceased using the sampler fan control system, as i am sure there is going to be someone else like me looking for faults that don't exist.
Roger