Worth checking this thread and the linked references in it which point to the valve on the bottom of the compressor
Air Conditioning Compressor Fail
2008 Skoda Octavia Elegance TDI 4x4 wagon
Bluefin 132Kw/385Nm, Racechips Response Control, Haldex Performance controller, H&R anti roll bars, Koni FSD shocks, SuperPro control arms & ball joints, subframe & gearshift mods, Full Dynamat interior, Polk Audio sound, Columbus, Bluetooth, MDI, parking sensors, camera. BBS SR 18x8" w/ 225/40xR18. 3M Crystalline tint.
Thanks for the link.
I've got it booked in again next week.
The service rep was keen to see my measurements to help support the fault diagnosis but I got the impression that my suggestions of what may be wrong won't be given too much credibility until they can find the fault for themselves. I have a feeling this is going to take a few revisits, I would highly doubt they have all the parts sitting around at the local dealership ready to go.
For reference I did the same checks on my 1z octavia (now the wife's car) and the air cooled down straight away when max cold is selected. I drive it with 22-23 deg outside temp and as soon as the car is moving the air temp easily reaches and stays at 4-5 deg C.
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