Air con compressor

[djshort_stuff]

I have a problem with my air con which i think is due to the compressor, because it isnt engaging when i turn the ac on, i have put a gague on the low port and it reads high infact it says warning, what i would like to know if anyone could help is could there be a problem with the air con pressure sensor if so where abouts is the sensor and how would i go about bypasing it to then see if that gets the copressor running?
Is there anything else i can check ive checked fuses all ok also the wiring on the compressor seems fine just want to make sure ive looked at everything before having to shell out for a new 1.
Also might sound like a silly question but if it is the compressor is that a job for a professional will the system need to be discharged then re-charged again?
Thanks 

[Wayne]

Anything air con wise to be honest is beyond diy repair.

I would get a specialist to carry out a full system test which will help find the problem.

The system will need to be discharged to replace the compressor.

[djshort_stuff]

Thanks for your help i have taken the car to air con specialist yesterday they said that the compressor is not getting a feed i have checked all wires and fuses, has anyone else got any ideas why the compressor might not be getting a feed,
cheers 

[Rhyso]

Check Fuse 5 in the fuseboard on the side of the dashboard

[djshort_stuff]

Thanks Rhyso yeah i have checked fuse 5, the car kind of pulses, revs pick up for one second then drop off again for about 3 seconds if i unplug fuse 5 it stops doing this then plug it back in it starts again, im guessing this means the fuse is ok should i change it anyway? thanks again 

[Rhyso]

The way I double checked was open the bonnet and look at the fans immediately behind the slam panel

Switch the fans and AC on and if the fans are turning then the fuse is fine 

But it does sounds like its fine

You could have a faulty pressure switch 

[djshort_stuff]

Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks

[Rhyso]

Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks

Its located on the bulkhead - have a look at Wazzzer's project thread as there are one or two pictures of its location 

When was the last time the system was re-gassed?

[Wayne]

Yeah both fans are running fine, i have heard about faulty pressure switches ive been trolling through post after post trying to find a solution, where abouts is the pressure switch and what does it look like im not really sure what i would be looking for? Also read about you can bypass it to see if it is faulty how would i do that
Thanks

Pull the plug and bridge the wires, I believe to change the switch you will need the system depressured.

I take it the system is fully gassed

[djshort_stuff]

The system was regassed about a year ago but the car was sitting for about 6months while i was away, they didnt say anything about low pressure at the ac place yesterday i have also put a gague on it which read about 90 which is high? Thanks alot for your time and replys gents