Air con won’t select eco or on?

Phil73

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Wondered if anyone else has had this issue and what can be causing it?
Car is 2016 A4 Avant, 64000 miles. When you start engine the AC , which I always leave set to ON and 21c, shows ON briefly then moves to OFF and you cannot select either ON or ECO. Changing the drive select makes no difference and can only think it’s a safety cut out because something is not right.

It’s in with the dealers next week anyway for a service but just wondered if anyone had something similar as internet search doesn’t show anything for a B9. As it’s a lease car not worried about the repair bill as I won’t be paying it ( yes yes I know I have paid it and some already in other ways )
 
There's been a few the same on here. It's usually out of gas. Mine's been in twice but, fingers crossed, seems to be lasting. They put some dye in this time.

It's a sealed system so if the gas needs refilling, it IS leaking from somewhere.
 
Been to a 'hand car wash' recently?

I experienced the same issue after my local car wash had blown a hole in my radiator with their over powered pressure washer.

£5 Car wash

£1200 Replacement Rad