What to do if my Bosch HMB405 Microwave Oven is sparking?
- JJason WilliamsAug 8, 2025
If you notice sparks inside your Bosch Microwave Oven, it's likely due to using metallic ware or ceramic ware trimmed in gold or silver powder. Do not use metallic ware for cooking except where noted in the cooking guide. Also, avoid using any type of cookware with metallic trimming.








