Hoping there may be some knowledge on how to get to the bottom of this problem. Car belongs to my son, I ran a scan on VCDS and no errors shown. I then took some readings with the AC off & then on, the system seems to be controlled by the ECU rather than a seperate system. I have posted the results below to see if anyone can deduce anything from the values. I can hear the compressor start when the button is pressed and can feel the temperature of the larger (supply) pipe go very slightly colder. My thoughts are that there is a possible leak. I could take the car for a regas but the garage have confirmed a tiny leak may not show up immediately.
Thanks in advance, Simon
Citigo log.txt