Its a little cold in the D3

[Sir WIll]

Right Ladies and Gents,

If I may have some of your collective wisdom.

My D3 is cold, no heat in the car so I have been going through the other threads in this regard but not getting much further.

1) AC Works fine
2) Fans blow and I can move the direction around from window to dash vents etc
3) Coolant level is fine
4) I have done a complete VAGCOM Scan this evening and the only error I get (Cleared and comes back) is:

01869 - Rear Left Cold / Warm Air Outlet Motor Position Sensor (G351)
010 - Open or Short to Plus - Intermittent

Now this may be at fault, but as its the rear control unit will that impact the whole system or just mean the rear does not get the heat?

The only other thought is the gearbox is a little slow and clunky so going in for a service soon and I have read in places there is a link between the two?

As always, I know I post here asking many a question but thanks in advance for support.