To remove a Frigidaire microwave oven door, unscrew the metal casing at the back of the unit and gently pull it off, and then remove the screws securing the hinges at the top and bottom of the oven door. Finally, pull the door to detach it from the hinges.
To remove the door of the Frigidaire microwave oven safely, first switch off the power supply, and unplug the unit from its wall outlet. Locate the screws that hold the protective metal casing at the back of the unit, and remove them using a screwdriver. Carefully place the oven face-down on a flat surface, and apply gentle force to pull the metal casing off the unit.
The microwave oven door is attached to the unit through hinges located at the top and bottom. Locate the screws that secure the oven door to the hinges, and unscrew them using a Philips screwdriver. Gently tug at the door to pull it off the hinges.
Note that when the Frigidaire microwave oven door is removed, it may nullify the warranty. Therefore, the oven door should only be removed if it is not functioning properly or has a crack or any other damage on it.