Refrigerator defrost thermostat kit. If the freezer is cold, but the refrigerator is warm you could have a problem with the defrost system. If so, the evaporator coils will be iced over and this thermostat kit may be defective.
Defrost timer. This is a 6 hour and 21 minute timer. Turn the dial on the timer clockwise to advance it into and out of defrost.
Evaporator fan motor