If your microwave is sparking brightly when you turn it on, it's a clear sign that something is wrong and needs to be addressed immediately. Sparks inside a microwave are typically not normal and could indicate a potential safety hazard. Here are a few possible reasons for the sparking:
Residual moisture or food debris: If you recently cleaned your microwave, there might be leftover moisture or food particles that were not completely removed. When you turn on the microwave, these particles can cause sparks as they heat up rapidly.
Damaged or worn-out waveguide cover: The waveguide cover is a protective panel usually made of mica or another heat-resistant material. It covers the microwave's opening where the microwaves enter the cooking chamber. If the waveguide cover is damaged, cracked, or has a buildup of food or grease, it can cause sparking.
Metal objects inside the microwave: Metal objects, such as aluminum foil, utensils, or even a dish with metallic accents, should never be placed inside a microwave. When microwaves come into contact with metal, they can create sparks due to the electrical charge induced in the metal.
To resolve the issue and ensure your safety, here are some steps you can take:
Unplug the microwave: Immediately disconnect the microwave from the power source to prevent any further sparking or potential damage.
Clean the interior thoroughly: Remove any residual moisture or food debris from the microwave's interior, paying close attention to the waveguide cover. If the waveguide cover is damaged or dirty, it should be replaced. Refer to the microwave's user manual for instructions on how to do this.
Inspect for foreign objects: Check for any metal objects or other foreign items that might be inside the microwave. Remove them carefully.
Restart the microwave: After cleaning and ensuring there are no obstructions or damaged components, plug the microwave back in and test it. Observe whether it sparks again. If the problem persists, it's best to contact a professional technician or the manufacturer's customer support for further assistance.
Remember, your safety is paramount, so exercise caution when dealing with electrical appliances and consider seeking professional help if needed.