Customer reported nothing working at all, checked as far as posible, decided main module faulty – replaced module every thing started up and appliance started to cool.
It then ran correctly for approx 24hrs then stopped running, called back checked over found that if power was turned off for short time then turned back on every thing started to work again.
Sound as if it goes into defrost mode then does not restart when derfosted.
the fridge has to carry out it’s defrost within 80 mins, otherwise it aborts and the temperature will rise.
turning the unit off and on again resets it and it will run ok again until the next defrost period, when the whole process starts again.
the problem is going to be a component on the defrost cycle, probably in the fridge and the heater itself could be the problem.
other components to check are the thermal fuse and the defrost sensor.