How do I troubleshoot a faulty air conditioning compressor in my Vauxhall Mokka?

My Vauxhall Mokka's air conditioning compressor seems to have stopped working. How can I troubleshoot this issue and potentially fix it myself?

First, check to see if there is any refrigerant leakage. If so, you will need to have it recharged. If not, it could be an issue with the compressor itself. In that case, it may require professional help to repair or replace the compressor.

Another possibility could be a faulty sensor or wiring issue. Check all of the connections and wiring for any damage or loose connections. If everything looks good, you may need to replace the faulty sensor.

It could also be a problem with the compressor clutch. This can often be identified by a grinding or rattling noise when the AC is turned on. In that case, the clutch will need to be replaced.