"Quite easy to remove old thermostat - if not sure where everthing goes take photos on mobile before taking apart. inside unscrew the two covers at the back to expose the end of the thermostat tubing, with the new thermostat take care not to damage the thin tubing straighten very carefully and when ready feed back into position. i found it best to lay the freezer on its side to get to the bits that needed to be removed on the under side. when all was back together turned back on and worked ok."