Microwave displays dE and will not start; often indicates the door is not detected as closed.

Safety: Unplug the microwave before inspecting the door area.

Steps:

• Check for obstructions: Inspect the door gasket and frame for food debris or foreign objects. Clean with a damp cloth and dry.
• Close door firmly: Open and close the door several times, ensuring it latches with a clear click.
• Check hinge sag: Gently lift the door while open; excessive play may indicate worn hinges causing misalignment.

If dE persists even when the door appears to close properly, the internal door switch assembly likely needs adjustment or replacement by a technician.