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Thanks @pwood999 Yes, mystified why nanocom would'nt run it. Established, 12v/ground at relay. After angst went back to an old spare yellow relay and it all works!! This suggests the new bosch relays purchased are flacky. Onto next issue

If it's running a lot given there appear to be no leaks, the compressor is prob not working properly. A rebuild is fairly strait forward. This is a great place to start A spray bottle with (dishwashing liq/water) can be used to spray the various connectors, to check for leaks. I would also...

Bucket can be avoided by blowing most of water out the pipes from firewall :) Yes considered longer bolt with a large washer to even but decided against with what was available. I did get a tiny weep/wetness at o-rings hence nipped it up after a day or so. I also tested matrix prior to...

Unsure how to test if EAS ECU runs relay. Guess nanocom could be used to listen to relay? Won't run with orange wire grounded. @Datatek When you mean eas box, do you mean the connecters under the valve block? In engine bay rather than the ECU under passenger (LHS) seat? The drivers side (RHD)...

Whats best way to check this?

I can run the compressor with jumper at relay. NOT able to run with nanocom too btw. When run via relay it gets the car off bumpstop in about 4/5 min from empty so internals of the compressor appear good. Mystified why it wont run on its own as conditions for it to run in #67 above appear to be met.

Thanks shows Inlet valve:close Thermal switch: Normal Pressure Switch: OPEN Lower Switch: open Raise switch: open From paulP38a, "for the compressor to operate automatically, the following conditions must be met: Engine speed greater than 500rpm; Pressure switch operational (open); Thermal...

When doing matrix, to limit mess, remove the two hose clamps in engine bay and seal (can connect together with suitable adapter, clamps etc to get out of jail). Blow air into one end of pipes at firewall to get most of the coolant out the other pipe. This should minimise the coolant left in the...

Resurrecting this thread. Similar issue where compressor refuses to run on its own. Nanocom also refuses to run compressor. Can however run by removing relay and jumper to 2/5 ? Have swapped to new bosch relays (non orig yellow), one older yellow relay from another location hence know to 'work'...