09/01/2026
LG Microwave Trips the Circuit Breaker — What Could Be Wrong?
When an LG microwave repeatedly trips the circuit breaker, the cause may be an internal electrical failure. A defective high-voltage capacitor is one possibility, especially if the breaker trips when the microwave starts heating. Other potential causes include a failing magnetron, high-voltage diode, damaged wiring, loose electrical connections, or a problem with the household circuit itself. An overloaded circuit or faulty breaker can produce similar symptoms.
The timing of the breaker trip can provide useful information. If it happens immediately after pressing Start, an electrical short or component failure may be involved. If it occurs only when the heating cycle begins, the high-voltage system should be inspected. Do not repeatedly reset the breaker or attempt to open the microwave cabinet. High-voltage components can retain dangerous electrical charges even when the appliance is unplugged.
If your LG microwave is tripping the breaker, stop using it and arrange a professional diagnosis. Contact San Diego Appliance Repair Service to schedule LG microwave repair in San Diego and identify the source of the electrical problem before further damage occurs.