The reasons for the humming microwave

Today, almost every home has a microwave, with which it warms up food, cooks hot sandwiches for breakfast, and warms up milk formulas for young children. Microwave ovens emit when working buzz and not much noise. But when the noise becomes too strong, then this is a signal to users - something goes wrong. Let us see why a microwave can buzz heavily when it works.

Incorrect work

When the microwave is buzzing when turned on, it means that one of its important parts has failed.

1. Platform wheels. The rotating platform has an electric motor of low power, under it there is a special round stand with wheels that move along the bottom of the inner chamber.If the bottom surface of the long operation is filled with fat, then the wheels will slip - the load on the engine will increase, it makes noise, which can lead to its breakdown.
   

2. Fan. It also has a low-power engine that runs continuously, in some low-end models the platform and the fan have one engine. If you hear extraneous sounds, the cause may be a motor malfunction.
3. High voltage transformer. It can emit a strong hum when a fault occurs in the winding, as a result of which the load on it has increased many times. At the same time there is smoke and the smell of burned winding.
4. Magnetron. This very important unit can fail because of long work at full capacity.
   

Checking the operation of basic elements

To find out why the microwave began to buzz, you need to check all the main parts and components of the product. First, we disconnect the equipment from the network, then we take out the instructions and open the layout of the parts in order to find out their exact location.

Fuse

The first thing to do is to check the status of this little electrical circuit guard from various nuances.We open the container of protection and inspect filamentif it is burned out, then the device must change. You only need to purchase a similar product with the same parameters. Do not insert bugs - they are the source of the fire.

Capacitor

If at the start of the microwave produces uncharacteristic sounds, it is this element that is pierced. To check exactly, you need connect an ohmmeter: the arrow has deviated - everything is in order, the device is silent - a replacement is needed.

Before testing, it is necessary to discharge the capacitor, in any case do not touch it!

Diode

There is a small detail in the high voltage circuit that is easier to replace than to test. You can simply check its serviceability - the capacitor does not heat up when the diode is in good condition. The hum of the microwave oven during start-up and the blown fuse are considered signs of diode failure.

Magnetron

This main unit of the microwave generates a high-frequency electric field inside the working chamber, due to which the products are heated. A characteristic symptom of a malfunction of the magnetron is an extraneous hum when operating a microwave oven, products do not heat up.

It is necessary to inspect the magnetron for the formation of soot or cracks, replace it with a new one, with similar technical characteristics.

Basic security measures

The design of the microwave oven of all models is almost identical, only the control panel is different for everyone, so they break, as the repair practice shows, in the same way.

Repair statistics assure that basic faults microwave arise due to incorrect operation, violations of the basic recommendations of manufacturers, and not due to factory production.

Before finding out the main malfunctions and methods for eliminating them, each user should carefully study the safety measures when using high-risk household appliances:

1. If the fan inside the product does not work, then it cannot be started.
2. Do not start the magnetron in case of damage to the working chamber and the open door.
3. In no case do not connect a shot magnetron - its radiation sometimes exceeds 2-4 thousand volts, which is very dangerous.
4. Before routine inspection, be sure to disconnect the product from the mains and discharge the high-voltage capacitor.
5. Upon completion of the repair, carefully inspect the inside of the microwave and remove all extraneous small objects.
6. Microwave oven never does not turn on without load. To check its work after the repair - put inside a container of glass with water.
   

7. When it is necessary to replace a broken or burnt part, it is only necessary to install a similar version with identical parameters.

When operating correctly, the stove in standby mode should not make much noise or make some kind of buzz.. Only the display, which displays the time of the operating cycle, and in some models, and the current time can be lit.

Operating rules

We told you about the basic malfunctions and some ways to eliminate them, but it is much more important not to allow the occurrence of various malfunctions. To prevent them from occurring, follow strictly simple recommendations:

1. Never use to warm food. metal dishes (the list of permitted is presented in the article what utensils to choose for a microwave).
2. It is impossible to turn on the microwave without food in the working chamber (for more details see the article what will happen if you turn on an empty microwave and whether it can be done).
3. Heat liquids and fry eggs only in a sealed container.
   
4. To carry out maintenance work regularly, all parts with the utmost wear should be changed in a timely manner.
5. Keep the camera and platform clean.
6. To eliminate the effect of power surges on the network on the smooth operation of the product, install a special power supply.

Every user should know that a microwave is a very complicated, dangerous high-tech product, which must be handled very carefully, comply with all manufacturers' requirements and comply with operating rules. Careful attitude to any household appliance significantly extends its assigned resource, therefore, microwave devices will delight you with quality work, rather than frequent and burdensome repairs.