The microwave began to buzz what to do

Why is the transformer buzzing: the main causes and methods of elimination

Today, almost every house has a microwave with which food is heated, hot sandwiches are prepared for breakfast, and milk mixtures are heated for young children. Microwave ovens publishes at work as a buzz and a slight noise. But when the noise becomes too strong, this is a signal for users-something goes wrong as it should. We will figure out why the microwave can buzz hard when it works.

The reasons why the microwave begins to buzz is many. Regardless of what level of complexity of the breakdown, the device should be fixed or serviced as soon as possible. If this is not done, even a small problem can cause serious problems and increase the cost of repairs.

The tray is slipping

This is most often due to insufficient maintenance. Namely: under the tray the remains of food accumulate, the plate is. As a result, the engine experiences heavy loads, can slip. This leads to its overheating and wear. The microwave should be cleaned.

If this did not help, you will have to check the condition of the drive system. To do this, remove the casing and the bottom of the pallet.

Fan fan is broken

Most often this happens due to wear of the sleeve. This happens quite quickly in inexpensive microwaves. Even more such a problem is manifested in models having a common engine of the pallet and fan. The air blowing system and air circulation must be checked.

Problems of magnetron

With the complete failure of the radiating lamp, the microwave makes a loud rumble and does not warm. The breakdown of the magnetron is dangerous. Microwaves with such a problem often sparkle. The magnetron should be checked.

This work is recommended to be entrusted to specialists. Home masters with measuring instruments can look for the characteristics of a particular magnetron model on the Internet.

The emitter is most often non.combination. He is changed entirely. You can buy a new magnetron on the Internet. However, its cost is often comparable to the new microwave. Therefore, if testing has shown a breakdown, it is worth considering whether it is necessary to do repairs. After all, the purchase of a new microwave is guaranteed to exclude the possible reasons for the failure of the magnetron.

The breakdown of the capacitor or the change in its parameters

In this case, the microwave makes strange sounds. You can check the capacity of this part using a conventional multimeter. But before testing, the capacitor must be completely discharged. If the case is not called when measuring parameters, it means that you need to change this part.

The failure of the high.voltage diode

With this breakdown, the microwave makes a squeak, whistles and heats the heat exchanger. Repair is made simply: the diode is checked by a multimeter and, if necessary, is replaced. If the part works fine, it is not nicknamed at 9V.

The fan has broken

The fan may break the bearing or impeller blades: when rotation, they will publish an unpleasant noise. A strong hum usually occurs due to problems with cooling the device in which the fan takes the most direct part: if something is broken, the blades are very contaminated or the dirt enters the engine or bearing-you cannot avoid the hum of hum. If after cleaning the fan the rumble does not disappear, you have to call the workshop.

The high.voltage diode may burn out the winding and then it begins to buzz when the device is turned on. Be careful: this is just the case when independent repairs are associated with increased risk due to high tension-it is better to call a specialist.

Frequent reasons for turning off the microwave oven after the start

The microwave oven may turn off for the following reasons:

• The device heats something from the outside. For example, in the hot season of the year, the cuisine’s space can heat up to the maximum temperature. If the device is in the immediate vicinity of the stove, the effect will be the same.
• Fan motor malfunction that will have to be changed. This happens if when the microwave is turned on, the melted plastic smells and sparks are visible inside.
• Violation of the interposition of the starter and rotor due to a slight distortion. It is worth taking a closer look here: in the space between them there may be pieces of food, accumulated dust.
• Fan fan bearing breakdown, which requires its replacement.
• Fan blades failed. They can either scroll or completely break off. You can try to restore them, but the best option will always be replacement.
• When turning on, the stove fan begins to buzz. it is necessary to clean.
• The microwave turns on and the fan is not. In this case, the cause of the malfunction in the damaged outlet or network cord.
• The cooler blades do not rotate, which means a malfunction of the buttons block or speed regulator.

Crack

The unusual loud noise of the microwave oven arises not only when a certain component is faulty. Noise and crackle can be caused by the products that you cook in the microwave oven.

• Dense food, such as meat, can cause more noise when heated. Therefore, try to close the meat with a cap when you warm the meat in a microwave oven.
• Try covering the products that you heat in the furnace. This will reduce the noise. In addition, the trace of the microwave of the furnace should always be clean, since the remaining food on the tray can also cause crack.

Finally, do not use metal objects or dishes in the microwave, not suitable for use in a microwave, as this also leads to crackling.

How to replace the magnetron

To put a new magnetron in the microwave, you will not need special skills. Only attentiveness and ability to use a screwdriver are needed. The microwave is disassembled. All contacts of the connector should be placed in order to establish a new magnetron correctly.

A new part is installed. If it is not possible to find a product with the same marking, you can find an analogue. Its capacity should be higher than the standard magnetron. And, most importantly, to coincide the dimensions of the case and the type of connector. When installing, the node must fit tightly to the waveguide to exclude radiation leaks.

You need to apply thermal main. The old is removed, the part is thoroughly cleaned of its residues and degreases. The pasta layer must comply with the recommendations of the manufacturer of the thermal conductive.

How to replace the magnetron

To put a new magnetron in the microwave, you will not need special skills. Only attentiveness and ability to use a screwdriver are needed. The microwave is disassembled. All contacts of the connector should be placed in order to establish a new magnetron correctly.

A new part is installed. If it is not possible to find a product with the same marking, you can find an analogue. Its capacity should be higher than the standard magnetron. And, most importantly, to coincide the dimensions of the case and the type of connector. When installing, the node must fit tightly to the waveguide to exclude radiation leaks.

You need to apply thermal main. The old is removed, the part is thoroughly cleaned of its residues and degreases. The pasta layer must comply with the recommendations of the manufacturer of the thermal conductive.

What exactly can spark

If the microwave sparkles and you want to repair it, you need to know how the device works.

One of the main elements of the device is the magnetron that generates electromagnetic waves. If their tension is high, high frequency fluctuations appear. If the wavelength is 12 centimeters, and the frequency of 2.4 gigahertz, the microwave begins to work.

So that the microwaves do not go beyond the device, it is necessary that the door is always closed. Water is heated when electromagnetic waves and molecules are contacted.

Why can spark

Electric discharge appears when two conductors contact. If the contact occurs, sparks will appear. Such guides can become:

Therefore, it is forbidden to put dishes made of metal in the microwave. If foil is needed for cooking, the distance between it and the microwave should be at least 3 centimeters.

Sparks can also appear if there is a container inside the microwave, the size of which is too large. Such containers relate to the walls of the heating chamber, scratching enamel.

If the conductors are in contact, an electric discharge appears inside, and this can lead to a breakdown. That is why, the microwave cracks and creates sparks.

LG microwaves crack and sparkle if they are empty (there is no dish inside).

Wallpower cover

Magnetron is not inside the microwave, but in a special camera of the waveguide. There is a special cover at the top of the waveguide, which does not allow the current to go beyond the chamber. Such lids are made of plastic or mica.

If dirt, fat or particles of food hit the lid, they can catch fire, making a crack. Electricity that falls on this dirt burns it, because sparks and cracks appear inside.

If this happens, the cover will be damaged. When it is damaged, it is unlikely that you can limit yourself to replacing the lid itself, most likely you will have to replace the magnetron and its cap. It makes no sense to clean the lid of the carbon fiber, since the charred areas began to metallize. Such a malfunction is very difficult to repair yourself. Will have to contact the experts.

Magnetron is the most important and expensive part of the microwave oven. Its cost may exceed 100. If the magnetron is damaged, it is likely that electromagnetic waves will burn one of the walls of the microwave.

Enamel damage

Sparks can appear if enamel is damaged inside the microwave. From a constant temperature difference, it begins to deteriorate. It is necessary to buy a special enamel (in the store of household appliances) and apply it to the walls of the microwave. Do not look for the replacement of enamel, since other solvents can lead to negative consequences.

Microwave enamels can be electrically conductive or special food (based on organic substances). It is recommended to apply new enamel, having previously removed the remains of the old one (only those areas that are damaged).

Basic security measures

The design of the microwave of all the models is almost identical, only the control panel is different for everyone, and therefore they break, as evidenced by the practice of repairs, the same.

Repair statistics assure that the main malfunctions of the microwave arise due to incorrect operation, violations of the main recommendations of manufacturers, and not because of factory marriage.

Before finding out the main malfunctions and methods for their elimination, each user needs to carefully study security measures when using household appliances of increased danger:

• If the fan inside the product does not work, then you cannot start starting.
• The launch of the magnetron does not produce if the working chamber and the open door are damaged.
• In no case do not connect the removed magnetron. its radiation sometimes exceeds 2-4 thousand volts, which is very dangerous.
• Before a preventive examination, be sure to turn off the product from the network and discharge the high.voltage capacitor.
• At the end of the repair, carefully inspect the inside of the microwave and delete all foreign small items.
• Microwave oven never turns on without load. To check its work after repair. put a container of glass with water inside.

With proper operation, the stove in the standby mode should not make noise or make some kind of buzz. Only the display, where the time of the working cycle is displayed, and in some models and the current time, it may glow.

The story of the appearance

According to legend, the microwave oven (in everyday life was called “microwave”) was invented quite by accident. You can believe it? According to legend, this happened in the army of the United States of America, when one of the military forgot about his Hamurgger, who left opposite the radar. And under the influence of radar radiation, a cold piece of meat in a hamburger, turned into a juicy, hot and delicious stake. Thanks to this occasion, scientists came up with the idea to create a device that can quickly warm up food, and at the same time not to occupy a large space. So a microwave oven was created, which quickly gained popularity among all segments of the population.

The microwave oven firmly entered our lives and has become an indispensable thing in the kitchen. With its help, you can cook various dishes using both fresh products and semi.finished products. But, basically, its main purpose is the heating of food. After all, only a few minutes are enough, and your dish will become more attractive and tasty for use.

However, along with a lot of positive qualities, the microwave has problem areas associated with frequent breakdowns. All this causes inconvenience to their owners and requires additional financial investments and time for repair work.