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

Safety first: Unplug the microwave from the mains before removing any panels. Microwaves contain high-voltage components that can retain a dangerous charge even when unplugged. If you are not experienced with microwave repair, contact a qualified technician.

Basic checks (no disassembly):

• Open and close the door firmly several times to ensure the latch hooks engage fully.
• Inspect the door for visible damage or warping that might prevent proper closure.
• Check that no food debris or grease is obstructing the latch area or door frame; clean carefully.

Interlock switch inspection (requires removing outer cover):

• Unplug the unit and wait several minutes.
• Remove the outer cabinet screws and lift off the cover, keeping clear of the high-voltage capacitor area.
• Locate the door interlock switch cluster near the door latch assembly (typically includes primary, secondary, and monitor switches mounted on a plastic bracket).
• Visually check for broken switch actuators, loose mounting screws, or misaligned latch levers.
• Using a multimeter set to continuity, test each microswitch while operating the door latch by hand. Replace any switch that does not change state (open/close) correctly.
• Reassemble carefully, ensuring the latch bracket is firmly secured and aligned with the door hooks.

When to stop: If you are unsure about working near high-voltage components or cannot access the switches safely, stop and call an authorized Teka service center.