I 'pulled the plug' and boxed up the cooling unit. I've been told some 'magic' will be done
To pull the plug there is only a few screws after the fins are off inside. Disconnect the obvious wires and pull the thermistor.
It's basic Erector set until you need a knife and gently separate the foil cardboard from the metal box.
Then gently lift the plug which can be snug. Foam is blown in while the cooling unit is installed for a tight fit. Hopefully you have enough release agent ... a few cannot be pulled (it is said).
Looking forward to hearing how our cooling unit does in 'surgery' .... I was told again today they feel very confident it's performance can be improved significantly.