Re: BEKO CFD64B
Presumably theres an NTC mounted in the fridge cavity/wall that senses the temperature in fridge, not definite about this though. Theres 2 NTCs listed, ones the defrost one in the freezer department.
On the rear control board, the 4way cable on the right hand side of PCB- blue = neut, brown = line, yellow = defrost, black = comp’ on the left of PCB, there a 3 pairs of cables, from top down they are potentiometer control, defrost sensor, evaporator sensor.
I’m presuming the evaporator one is foamed into the rear wall of the fridge & is not replaceable. Most of these electronically controlled ones will defualt to timed cooling if theres a problem with the control NTCs.