Chosen Solution

By turning temperature setting knob back/forward from its “OFF” position to different cooling temperature positions a couple of times, the thermostat will trig on compressor working till 4C temperature setting point. After that, this refrig will not trig on by itself when temperature inside raises. When I start over to play same temperature setting knob again, it will work again at same pattern. Does this indicate the thermostat (temperature setting knob) fails and needs a replacement?

Hi @szhang2 , It seems like it does point to it being the problem Could you please verify the model number of the refrigerator? The model number that you posted gives no results.