Experience seamless airflow with the Samsung microwave fan blade (DE31-90057A). If your microwave is overheating or not ventilating properly, it may be due to a faulty fan blade. This genuine Samsung part is designed for select 1.4 CU. FT. countertop and 1.9 CU. FT. full-size microwaves. Make sure to verify your microwave's model number for compatibility before purchasing.