Hey guys I am looking at buying a AU 1 Forte, I have a question regarding the ventilation, I have noticed that it only blows air through the front demister, no where else even when the engine is running, it is also got a older sony head unit (which was a bit dodgy) I'm wondering if the owner could have done something to the switches and vacuum lines
Any advice is appreciated

think there 'might' be a mechanical problem which means removing dash ... however not 100% sure

demist is the default position - yes it could be due to a dodgy radio fit also numerous other possibilities eg. vacuum line at rear of engine may be disconnected - vacuum lines at control - vacuum lines behind glove box area -vacuum lines accidentally pulled off during radio fit etc.......
normally if it was vacuum tank problem you would get normal vent operation with engine running and would change to screen when under load ie.up hills........

use the problem to get a better price ??