i own fabia II 1.4TDI PD 2009. My  manual AC simply wont turn on, or heating potentiometer also not working (it's blowing same air temperature all the time no matter on potentiometer position). I tried to switch 3 air control panels, same results. i also found out that problem could be in BSI module, today tried 2 different one's same result. I checked all fuses (that i know ) every one is fine. sorry for bad english and thanks for help.

anyone have some idea ?

Any fault codes?

it was the fuse :S under number 9 (some book with exclamation mark)