Common Microwave Issues
Please check first if the circuit breaker tripped. We see that a blown fuse can cause this as well and can easily be replaced and fixed. A more intricate issue could be a defective control board. A technician will be able to verify if the bad connection can be located and repaired, otherwise the entire board must be replaced.
Most often this is caused by a defective magnetron. Other causes are a defective HV capacitor, defective control board, or there is a short in the HV Rectifier. A technician can test the connections to verify the actual cause.
Grease accumulated in the cavity can cause sparks during use. It’s important that you regularly clean the interior of the microwave. Another issues could be that the microwave stirrer may have become inoperative due to either a defective motor, fan motor, or broken belt. Without the function stirrer, microwave energy concentrates on one internal part which will cause burning, sparking, etc. Lastly, the HV Rectifier may need to be replaced.
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