Need Appliance Repair Help? Ask a Technician for Answers ASAP
It sounds like your compressor itself is overloading and was shorted out. Try to unplug the wires going to the compressor and see if the humming and clicking stops. If so, then you need a new compressor as well and it might just be better to replace the refrigerator since a new compressor is about $650.
All the wires going to the side of the compressor. Just unplug them from the compressor. They plug into a plastic box called an overload relay, just remove it so that the compressor isn't attached to power.
You're gunna have to find the thump.