Think this has been covered in previous posts, Samsung have brought out a mod. The kit comes with a new sensor and instructions to alter the eprom file to extend the defrost. The heater stat and t/f on the first batch ate prone to have the wires come adrift so will overfreeze due to no defrost. The mod kit part number is DA8101997A
Yes it is supposed to cure it but doesn’t always.it also has a habit of causing more damage to the liner behind the evaporator as the heater is on for longer.once the liner is burnt then the appliance is scrap..BUT samsung engineers aren’t allowed to tell you that but was informed to use a botch up sticky foil to patch it up.check behind the evaporator.if it’s damaged then samsung MUST give you a new once as it’s a known defect.