Hi all, I have a problem, the magnetic air-con compressor clutch does not engage - what could be the issue....presure switch?, heater valves? - This is what I see in the Bentley Manual, not much more help than that. How does one test these components.
I have a Carsoft diagnostic tool but it does not pick up any faults on the aircon. I also have an Electronic TIS which doesnt help much either.

Any tips from you guy's, perhaps what should the pressure in the system be?
thanks again all.