Machine is 5 years old and recently the internal temperature is sitting near -30C. It used to sit at around -18C and has done until recently.

Adjusting the temperature adjuster control makes no difference to the internal temperature. It is a frost free model and when the door opens the fan switches off and it is still staying frost free.

Taking off the top front panel reveals it is controlled by a circuit board that has the door switch wired to it. It has the fast freeze button mounted on the circuit board which appears to operate OK.

The temperature control basically rotates a potentiometer on the circuit board.

Looking at the back of the machine apart from the mains wire, there appears to be no other control wires visible.

Can anyone suggest what can be done? I notice the circuit board is available for circa £70.

eddie