You may recall that my air-con has not worked since I bought Zeb' in '09. With this hot weather I have been sort of 'on a mission'

Mind you at the speed I'm going, I may have cool air by the time winter gets a grip
I did get the system to run for a short time.... a few love taps to the compressor.... then it soon died again. I found the connections on the Pressure Switch Trinary very dry and crumbly. Touched one and the wire came off! I thought I'd better try to solder it back in place..... I'm a real novice at soldering & somehow I managed to knock all 4 wires off

. Having no idea which went where I gave up & looked for a replacement. Eventually,I sourced a used Pressure Switch via Ebay.de . £25 It is en-route.....
Having searched, the most common failure on these systems is that the gap on the air-con compressor clutch becomes larger over time with wear. Eventually the gap will be too large for the magnet to be able to pull it in to engage.
Gap should be 0.3mm-0.5mm.
Fixes range from inserting breadclips, using wire & disconnecting the the compressor, pulling the clutch plate and removing one of the shims behind it.
The breadclip fix apparently works, but they can sometimes 'fly out' with the force of the clutch spinning, so though easy it may be job that needs re-doing from time to time.
I decided to go for the 'wire fix' which i read on volvospeed I think. They said to lower the subframe for better access. I found that not nesassary, small hands rule!
The engine tray had gone AWOL some time back. There is another guard/tray to the front on the car. I removed this and found:

A rather tired looking Evaporator Still, the system still has gas, so hopefully........
The compressor (clutch end)

Measuring the gap (ignore the 0.09 gauge just to show where') The gap was 0.8mm.

So I began to feed in some wire which should push the plate in closer to the magnets.

All the way round.

And twisted tight-ish (don't want it to snap) and tidied up.

Re-checking the gap, which came out a neat 0.3mm all round - Spot-On!

Finally, I cleared the loose paint and rust from the evaporator & gave it coat of good old Hammerite!

Bring on the pressure switch! Fingers crossed:thumbs_up: