Today I have replaced the faulty motor (positioning switch) picture enclosed of the actual item replaced (1J2907511A).
If you are like me and want everything working and enjoy a good fiddle then I recommend this job, as I felt rewarded in the end!
With the car centre console in bits, and glove box off (you need to remove all the centre console parts; where the handbrake / ashtray are).
Finally you will come to the blower heater, I removed this too, to see the positioning flaps, and understand how they work.
The hardest part of the job was removing and then re-attaching the replacement motor part (1J2907511A) as its a tight space to work in. There are some thick bundle of wires, and I cable tied these up to gain more room for my hand and sore wrists.
To fit it, is quite hard to explain, and you kind of wish you had "3 hands", the way I did it was to press the recirculation button on the Climatronic whilst pushing in the motor (1J2907511A) to the flaps, and feeling it 'click' and then you can see the flap moving. There are 2 flaps this motor 'positions' and I found the one you attached the black (thinner) part easier than the white (thicker) part to the positioning flaps.
I played around for a good couple hours just making sure they position correctly by pressing the recirculation switch time and time again. Then when i was happy i screwed up the motor (1J2907511A) back up again, then tested a few times to ensure it was working.
I indeed had a faulty motor that didn't seem to work at all. The replacement (1J2907511A) I used was a second hand eBay part for about ÂŁ15. VW wanted something like ÂŁ205 plus VAT (just for the part). To be honest for peace of mind I would of paid this (after experiencing so many faulty door lock modules). I am happy and confident the second hand ÂŁ15 part will work just fine though. I did test it with the existing wire to check it was working before I fitted.
There you go, hope this helps someone who has this error, I didn't want to open up a post and not finish it.
Sean