Microwave beeps and displays E1, will not start a cooking cycle.

Safety first: Unplug the Swan microwave from the mains before removing any panels. High voltage is present inside even when unplugged; do not touch the capacitor or magnetron area.

• Step 1 – Check the door closure: Open and close the door firmly. Ensure the door is not sagging and that the latch hooks fully engage the cabinet. If the door feels loose or misaligned, inspect the hinges and latch for damage.
• Step 2 – Inspect the door switches (interlocks): Remove the outer cabinet (usually screws at the back and sides). Locate the door interlock switch cluster near the door latch. Check for broken switch actuators or burnt terminals.
• Step 3 – Test switches with a multimeter: With the microwave unplugged, remove one wire from each switch and test continuity. The primary and secondary interlock switches should change from open to closed when the door is closed. Replace any switch that does not change state correctly.
• Step 4 – Check wiring harness: Inspect the wiring from the door switches to the control PCB for loose connectors, heat damage, or broken insulation. Reseat any loose connectors.
• Step 5 – Reassemble and test: Refit the cabinet, plug the unit back in, and test a short 30-second heat cycle with a microwave-safe cup of water.

If the E1 error persists after replacing faulty switches, the control PCB may be defective and should be diagnosed by a qualified technician.