I have an Octavia Ambiente with manual air con (not climatronic). Two problems with it in this cold/damp weather:

 

1) the windscreen mists up very badly and very quickly when the car is parked, and the windscreen demister vent does not really have any impact, as very little air comes out even when directed full blast at the windscreen

 

2) Under no circumstances will any air whatsoever come out of the two facing vents in the centre of the dash (above the radio)

 

I have read on here that the demister is poor by design, but there really is very little air hitting the screen. I wonder if something has packed up within the dash which prevents air coming form the centre vents,  and is this a known issue or is there an easy way to check it's all working in there? 

 

Would a fault code read reveal anything given that it is not climatronic?

 

Cheers

Just been out to have another look at this - seems that whatever position the right hand dial (windscreen/face/feet) is in, the output is: Nothing from centre vents. Hardly anything from windscreen vent. Side vents and feet vents blowing hard. 

 

Is there a motor that controls the diversion of air that needs replacing? Is it a diffucult job?

There are a multitude of flap motors, some easier to get at than others. They may just need recalibrating, quiet easy if you have access to VCDS.

Had a look behind the switch, turns out manual air con has cable controlled flaps, and when installing my Parrot handsfree kit, I had inadvertently disconnected the cable from the switch. reconnected it and now all is well.