I have a whirlpool American fridge freezer and the defrost function does not seem to be working.
Already had a technician out as I have an extended warranty and they have replaced the main control board twice.
As i don’t think it’s the board I have checked the heating element for continuity (90ohms), the thermostat fuse for open and closed circuit. When then thermostat is goes from cold to hot the circuit loses continuity, so that seems ok.
When the freezer reaches full temperature it does not seem to defrost and a clicking noise seems to come from the control board, like a stuck relay, this is why they keep replacing the main board.
any help would be appreciated