Microwave works but does not heat: causes and what to do

In spite of the rotation of the glass tray, microwave oven does not heat and cold food reserves. It is possible to eliminate the reasons to continue to use the device.

No need to panic if the microwave oven operates, but not warm. The problem may not always be serious. Eliminate the causes easily yourself at home:

If, after a thorough examination of the microwave is still warm longer, so it really any more significant problems, remove that is not always possible without the help of a specialist.

More serious problems

Sometimes fail any components. This leads to the fact that the microwave oven does not heat up, despite the spinning glass plate and a burning inside the light device.

A faulty fuse

Fuse is needed in the microwave for protection from breakage more important, expensive parts. As a result of the fact that it is in the high voltage circuit, it is often hidden in a protective casing. Fuse consists of a transparent glass bulb, with which both sides are metal caps. These soldered wire, twisted into a spring that can not burn.

Fault limited destruction of solder on one or other side of the cap. Continuity is broken. Can solve the problem by removing the cap, soldered thereto and detached wire. After gathering all the components of the fuse, turn the device into the network and verify that it is warm.

Problems with the magnetron

  • Loose connections, which can disrupt their work because of the constant heat. A little squeezing them with pliers will be able to organize the work of the unit;
  • In some cases, the microwave did not work due to the fact that the cap magnetron antenna appeared a drop of solidified metal or traces of burning. This will help get rid of fine sandpaper. Treat the entire cap, polish it to a shine. The better the conductivity of the cap, the better the performance of the company microwave "Samsung" or another manufacturer;
  • If the antenna cap with the hole, you need to remove it and check well with the metal underneath. If the material is intact - the magnetron runs. In this case, you just need to replace the cap. If the metal of the magnetron is damaged - this part of the microwave oven automatically goes down. In this case, the magnetron can be changed (it is very expensive) or buy a new microwave oven.

The main sign of failure of the magnetron is the emergence of a strong buzz and hum during operation of the household appliance.

Problems with mica paste

If the microwave is no longer warm, pay attention to the condition of the mica plate. A large number of oil and varnish on it interferes with the normal operation of the device. In some cases, there may be even a spark and the characteristic crack. If particularly dirty, quite often there is a fire, threatening the lives of people.

Resolve this problem should be immediately. To this end, spun screws on a mica plate and using fine sandpaper, ideally smooth out the surface. Thereafter bolted in place and include a microwave, checking whether the repair has been carried out correctly.

In the presence of holes in the plate, inside the household appliance sparks appear and unpleasant odor. Then be replaced by a new plate.

blown capacitor

If, during the microwave switching, it starts making noise, there is a possibility that the blown capacitor. Is working properly, you can use the tester. When the resistance is weak or absent, it is necessary to replace the capacitor.

Faulty diode

Indicate the diode may damage the heating condenser during the microwave oven or heavy hum. Repair diode can not be, so it is thrown out and buy a new one.

Faulty transformer

The faults of the transformer says a large amount of smoke. However, it may not be, but the device still will not heat the food. therefore it is important to check the transformer. Its normal voltage when enabled oven - 220 V. If during the measurement voltage drops may cause a interturn fault which has occurred in the windings.

A transformer that can no longer do its job properly, replace new or rewound, which requires special skills and effort. Otherwise the stove will warm slightly or remain faulty.

Defective inverter

In inverter devices such as the LG model, the operation may occur a problem. The sense inverter control operation consists in varying temperature using sensor devices. The inverter determines the degree of cooking and heating causes the microwave to operate in the desired mode. This component of the microwave can be replaced with a new one.

Prevention of faults

To prevent malfunctions in the microwave Samsung or other manufacturers, it is necessary to adhere to simple rules:

  • Do not heat food in metal containers, as well as dishes with a metal-plated;
  • Dispense product without the device inside;
  • Do not heat or cook eggs;
  • Use the plastic cap.

Finding that the microwave to heat the food stopped, you must turn it off from the mains. Do not attempt to fix the problem if you do not have such experience. This can lead to even greater problems that failure of expensive parts. Contact the service center, where the master will return to the microwave for life.