Good evening gents. Got round to trying the air con which had never produced cold air. Had my air con serviced at Mr Clutch today full evac ,pressure leak test, anti bacterial clean , regas to 500 grams (their max ). Their rule is if any leaks at all they will not fill, they said it was gas tight so their part done, which I except. Got a call to say they could not get it to function , so I said i would look at it my self, they did however offer to extract and refill for me should such repairs require gas extraction. Got home and discovered the compressor clutch does not engage, nor the condenser fan on activating the air con from the dash. Checked both fans with 12v direct, both function. Under dash fuse 30 intact Under bonnet fuse 9 intact Tested both fan relays cleaned contacts , both ok. fed 12v from air con clutch solenoid relay terminal, solenoid clicks on compressor. Fed 12v from condenser fan relay terminal, fan engaged. Removed solenoid clutch outer plate, de rusted both interfaces with 600 grit wet and dry paper, removed 2 of the 3 shims and left the thickest in place reinstalled to force compressor, it engaged delivered colder air to cabin, ran for 30 seconds only. Reassembled all shims and reinstalled as was. On trust that Mr Clutch have done as they have said, and the fluid volumes and pressure are correct :- I am anticipating the pressure switch activates the compressor clutch and fan at the same time on activating the dash aircon button, as both do not function. The cabin fans ramp up anticipating colder air therefore , am I correct in assuming that this pressure sensor will be my faulty component stopping the air con from working ? A pointer to it location would be appreciated, bumper off job perhaps ? I know I won't be so lucky for it to be self sealing on removal, so am anticipating having the gas re extracted to effect its replacement.