Why the microwave sparks inside

Despite our wishes, no household appliance can work indefinitely. Therefore, at some point, the microwave oven may experience malfunctions. These issues can vary, such as the device failing to turn on or unexpectedly shutting off during operation, weak heating or no heating at all, a non-rotating tray, or unresponsive buttons. In this article, we will specifically explore one common problem: the crackling, sparking, and shooting phenomena that can occur inside a microwave.

What can provoke the appearance of sparks

1. Inside the appliance, metal dishes or containers with a metal rim have been placed.
2. Sparks can also be caused by a burnt mica plate.
3. The presence of metallic, silver, or gold plating on the plates is also a potential cause.
4. Enamel damage caused by mechanical factors can also lead to sparking.

If your microwave oven is sparking and cracking, or shooting, it indicates that you have not followed the instructions properly, and attempting to repair it without the necessary knowledge can be dangerous. It is recommended to seek professional help in such cases.

Determining the cause and eliminating it

Prohibited cookware

It is important to remember that putting food in metal dishes or plates with gold, silver, or metal plating into the microwave oven for heating is not advisable. Disregarding this precaution may result in the microwave crackling and sparking.

The reason behind this phenomenon is the formation of an electric arc between the metal components of the device and the metal dishes, causing the microwave to spark. Therefore, it is essential to exercise caution when selecting the appropriate utensils for your microwave.

If you do not exercise caution and a metal dish or utensil accidentally drops into the chamber, it is important to immediately halt the operation of the microwave and eliminate any forbidden objects. This will effectively halt any sparking that may occur.

Mica plate

One reason why a microwave may crackle and spark is the burning of the mica plate, responsible for scattering microwaves.

As dishes heat up, fats can settle on the plate. If the microwave is not cleaned in a timely manner or not properly cared for, food residues can accumulate on the plate and potentially catch fire. This can ultimately lead to the destruction of the diffuser over time.

To ensure that your microwave is functioning properly, it is important to promptly identify and address the cause of sparking. Failure to do so could result in damage to the main component of the appliance, known as the magnetron, which is nearly as expensive as the microwave itself.

So, what should you do in this situation? Start by checking the condition of the plate.

If your microwave starts sparking, emitting a burning odor, and accumulating soot near the mica plate, it means that the diffuser is broken and needs to be replaced.

Here are the step-by-step instructions for replacing the plate:

1. Begin by cleaning the microwave chamber.
2. Often, the dimensions of the purchased plate do not match those of the old one. In such cases, it is recommended to purchase a larger part and cut it to fit, while also attaching the old plate to it. The edges of the new plate should be carefully treated with sandpaper.
3. Create holes for fastening purposes.
4. Prior to fixing the mica plate, it is important to ensure that the magnetron cap is in good working condition. If it is damaged, it must be replaced as well.
5. Secure the new plate in place using screws.

As you can see, it is not a complicated task to resolve such a malfunction. The key is to carefully follow the provided instructions. After replacing the part, it is important to test the microwave, but not with an empty chamber!

Damage to the enamel inside the chamber

On occasions, there is a need to warm up a substantial quantity of food and, in order to be efficient, we opt for larger containers. However, when rotating, these containers, within the microwave oven chamber, tend to slide, rub, and collide with the chamber walls. Consequently, this motion results in the formation of scratches on the enamel surface, impeding the proper reflection of microwaves. Ultimately, this process negatively impacts the magnetron’s performance, as previously mentioned, which, incidentally, comes with a hefty price tag. Hence, it is imperative that any minor scratches on the enamel surface be immediately attended to and mended.

There is a possibility for you to handle this task independently:

1. First and foremost, you must rid the camera of any grease. Proceed to clean the affected areas using sandpaper before degreasing them with a solvent.
2. Subsequently, apply a layer of primer followed by two or three layers of enamel. You can utilize food-safe, fire-resistant, or electrically conductive enamel for this particular purpose.
3. Wait for the enamel to dry completely, then proceed to check the functioning of the appliance.

If, after powering on the microwave, it does not emit any flickering or smoke, then you have successfully executed the necessary steps, signifying that the device is now ready to be used once again.

Waveguide cover

Untimely cleaning of the appliance from greasy deposits is the most common cause of breakdowns, which can potentially lead to a fire. The waveguide chamber in the microwave contains a magnetron antenna that emits microwaves. This chamber is covered by a lid. The accumulation of dirt on this lid can eventually catch fire, as it acts as a dielectric material that does not conduct electricity. It is important to note that fire in this case is considered plasma, which can conduct electricity and may cause sparking and crackling in the microwave.

The socket and plug of the cord of the appliance

At times, a microwave oven might generate sparks while being switched on or off. This can occur due to a defective power outlet or cord plug. If the contacts do not connect properly, it results in uneven distribution of electrical current. Consequently, a short circuit or malfunctioning of the microwave can occur.

Additionally, you can also learn how to fix a microwave on your own.

In order to prevent the occurrence of a malfunction, it is necessary to examine the cord for any signs of damage, such as kinks or breaks. If any such issues are discovered, it is important to replace the cord. Additionally, if the socket shows any signs of cracks, chips, or scale, it should also be replaced.

How to extend the life of the microwave

To ensure the longevity of your microwave oven, it is important to periodically give it attention and abide by the generally accepted guidelines:

1. Regularly clean and wash the microwave to remove any dirt.
2. Avoid turning on the microwave when it is empty.
3. Avoid placing metal dishes or plates with metallic coatings inside the appliance.
4. Thoroughly inspect the appliance for any enamel damage.
5. Prevent grease from splattering by covering plates with a suitable hood.
6. Avoid placing large dishes in the microwave chamber that can potentially damage the enamel.

Appliances, just like people, require attention and care. Use the microwave correctly, strictly for its intended purpose, and follow the provided instructions. In doing so, you will ensure the device’s long-lasting and effective performance.