audi a3 8l clima problem

Hello,

I got an 2000' Audi A3 8L

Today I had the clima air conditioning on and it suddenly turned off , tried to switch it on again the light only flashes on clima board but not turning on , it keeps flashing everytime I press the button !

Here is a link attached with a video on youtube *

https://www.youtube.com/watch?v=cAI-8ekUe4c

What can I do to fix that or what could the problem be ?