What a day! Mains light only comes on with interior light. Interior light only comes on when stat is turned up to three. When it does, it comes on for a split second, then goes dim. Stat control is integrated into PCB. Compressor runs constantly and is freezing food in fridge compartment. It is in a holiday flat, and the customer thinks it may have never been right. It is switched off most of the time. They are not sure of the age, but think a max of three years. My instinct is to say call the manufacturer!!!! But I hate being defeated. Any ideas anyone? Cheers. Steve.