Re: Zanussi ZFK62/23RF
have not got much info on this one and like you dont really do fridges
have got a simple wiring diag for this it shows 3 heaters a defrost timer and a thermostat all could be all or some of the problem
if i was you and i wanted tio try and help you could try changing the main thermostat part no 2262306018 by the look of it it probably could be replaced by a qualtex ran100
I hope one of the fridge lads might confirm this. these stats are very cheap so as a trial fit its worth a go
Dave
ps will send you the wiring diag if you think it may help. let me have your email