Kashrut: Dairy/Meat: Microwave Ovens

As with conventional ovens, these factors determine kosher/non-kosher status for a microwave oven:
  • Was it clean?
  • Did the interior surfaces get hot (120° F--49° C--or more)?
  • Was it used in the previous 24 hours?
Note Microwave ovens do not have the problems of bishul akum that conventional ovens have.