Microwave trips the household circuit breaker or blows the fuse when starting a cooking cycle.

Safety warning: Repeatedly resetting breakers without fixing the cause is dangerous. High current faults can cause fire.

• Step 1 – Try a different outlet: Plug the microwave into another properly rated outlet (without extension cords) to rule out a weak circuit.
• Step 2 – Observe when it trips: If the breaker trips immediately when START is pressed, the high-voltage system is likely shorted.
• Step 3 – Internal inspection (visual only): With power disconnected, remove the cover and look for burnt components near the capacitor, diode, and magnetron. Do not touch the capacitor terminals.
• Step 4 – Professional service: Testing and replacing high-voltage components must be done by a qualified technician. Provide them with the model number and describe the tripping behavior.