Result.
Even if, as a mature age student, you didn't get to ask the hairdressing apprentices out.
I feel good this evening at having shonked a repair.
Sanden compressor had excessive air gap in the coupling, and the solid state relay for its clutch - sited in the body computer - was thermally tripping once everything warmed up.
Added a helper relay and new 20A capable wiring, that clutch came on like the Wagah gate shutting.
Car was an igloo in minutes.