AC Button not lighting up. Toggle button not working.

[Dar123]

New Audi Owner so forgive if this is not an issue.
When I have the climate control in Auto the AC button will not light up; even when pressed (it lights up but as you take your finger off it turns off). So I assume the AC is not running? I've looked at the manual but it says I should be able to toggle it on and off via the button.
I cannot check if I am getting cold air at the moment as the weather is quite cold.

Ive attached a video below. Is this a problem I need fixing or am I not doing something. (AUDI 2009 Sport 3.0 TDI)

Thanks

[Sam]

Welcome to VWAF

There are a few Audis, give us a clue which one you have.

[Dar123]

Sorry thought I mentioned it - its a Audi A5 3.0 TDI Sport 2009

[Sam]

You mentioned all but the model

Moved to the A5 section where hopefully you'll get the assistance you require.

[Dar123]

Thank you!

[Scott K]

My wife's A4 is going in this Fruday fir the same problem. The only thing I noticed is that her coolant level is below minimum. Might just need a re-gas I suppose.