I had my 2014 Octavia Mk3 2.0TDI CR150 serviced at the dealers in Oswestry recently, and asked them to do an air con service at the same time. When I got the car back they said they couldn't do the air con as it wasn't working, so they couldn't re-gas it. I didn't get much more info as it was the Ford service front of house person and they're not as helpful as the Skoda chap.
As far as I know if there is an issue, like it's low on gas it would turn itself off. So they can't re-gas it because it's not working, but it might not be working because it needs more gas!
All the fuses are fine, the light still comes on when you press the AC button, I've not got it on eco or turned off in the settings, and there were no real symptoms.
Any ideas? Thanks!