We had a tech come in for a diagnostic, according to the man four parts were in need of replacement. Heater, fan motor, thermostat and fuse. his estimate including labor $518.00 however his diagnosis didn't make sense because he did not test anything, his diagnostic was based on pure speculation. I ended up doing the work myself replacing the thermostat and fuse to a tune of $27.00 including next day shipping. By the way we had another tech come in previously his take: there's no remedy for modern fridges according to him these units are way too complicated and therefore disposable.