Hi Guys, I'm new on here so please be gentle....
Ok we had the dreaded "Suspension will raise once system cooled"
RR Sport V8 2010 L320
No lift at all.
Replaced the Compressor with a new AMK unit
No lift, no power to the compressor
Same notice "Suspension will raise once system cooled"
Gave the compressor some external voltage, and all four corners lifted!
RR on the ramp so we checked for leaks and couldn't find any.
Powered up the old compressor on the bench and it worked fine.
We still have the "Suspension will raise once system cooled" with the compressor not wired up..
We are going to replace the AIR SUSPENSION CONTROL MODULE ECU
Otherwise, we are completely out of ideas.

There are 2 temperature sensors on the compressor

As you have changed them with no improvement , I would say you have a wiring fault between the compressor and ecu (by pedals) in the 4 temperature sensor wires.


P.s. if you have changed from one brand of compressor to AMK you will need to reprogram, otherwise damage will eventually occur.
So maybe refit old one if you can’t program, once you have fix the temp sensor issue

Thanks, Andy, We will do as you suggest and let you know the outcome. Cheers Nick