Microwave will not start; display shows E01 immediately after pressing START.

Safety Warning: Microwaves contain high-voltage components and a high-voltage capacitor that can retain a dangerous charge even when unplugged. If you are not experienced with microwave repair, contact a qualified technician. Never run the unit with the cover removed.

Basic checks you can do safely:

• Unplug the microwave from the wall outlet.
• Open and close the door several times, listening for distinct clicks from the latch area. If the door feels loose or does not latch firmly, inspect the door hooks for visible damage or misalignment.
• Check that nothing is obstructing the door (food debris, warped trim, or bent chassis).
• Plug into a different outlet to rule out power issues, then try again.

Technical inspection (for trained persons only):

• Remove the outer cabinet (after unplugging) and locate the door interlock switch assembly on the right side behind the control panel.
• Using an insulated screwdriver, discharge the high-voltage capacitor according to service procedures.
• Test the primary, secondary, and monitor switches with a multimeter for continuity while operating the door latch. Replace any switch that does not change state correctly.
• Inspect the plastic latch bracket for cracks or warping; replace if the switches are not being fully actuated.

If you are unsure about any step involving the cabinet removal or capacitor discharge, stop and call a professional technician.