My AFB126 freezer gave up the ghost a week ago and I stumbled across this amazing post!. Just want to say a massive thanks as its resolved my issue by replacing the white cylindrical electrolytic capacitor on the board with a new one. Now the compressor kicks in again.
I got my replacement capacitor from here. Arrived the next day too!
https://www.cricklewoodelectronics.com/0.33uF-305VAC-X2-Mains-Rated-Polypropylene-Capacitor.html