What Causes The Microwave Magnet To Fail

At some time throughout the cooking process, every microwave has had the difficulty of not warming the foods inside the oven. However, have you considered why this is the case? What causes the microwave magnet to fail? If you already know the solution, that’s because the magnet in the microwave oven was damaged.

But, did you know what’s causing a microwave oven’s magnetron to struggle? There are a variety of reasons for a magnetron inside a microwave to malfunction. Resistance continuity, a loose magnetron connection, a burned antenna/dome, burned-out connections, magnets cracking, and so on.

The Causes
There are a few reasons why food is cooked in microwaves with low or no temperature. Look for the reasons for magnetron failure on this account.

Magnets are breaking
This occurs when the magnets in the magnetron are damaged, resulting in a reduction in its magnetic field. In magnetrons, the magnets’ overheating also causes harm to their magnets. The microwaves bouncing back to their magnetron cause the magnetron to overheat.

Terminals that have been burned out
The insulator inside the magnetron is designed to strengthen the entire magnetron from direct voltage attack. However, any damage to it could cause the insulator to fail. The magnetron terminal is burned as a result of the insulator breakdown. It rises with each cooking cycle, resulting in more severe burnout.

Burned Dome/Antenna
We could see the magnetron’s antenna/dome inside the microwave on the interior of something like the filament box. This reflection back of microwaves when cooking is the source of the damage. The reflected microwaves harm the microwave stove’s antenna/dome, preventing it from sending microwaves.

Loose magnetron connection
It is the most typical reason for the magnetron to fail. This sloppy connection generates a lot of heat resistance. Other sections next to this magnetron will be burned out as a result of the heat, resulting in black patches and burn scars on the affected area.

Resistance continuity

The resistance continuity is part of the testing procedure because the above reasons are tangible to observe. An ohmmeter is used to evaluate the resistance between the magnetrons’ terminals. You must unplug the microwave stove’s power terminal before testing.

The resistance continuity should be infinite after adding the ohmmeter. If the measurement isn’t continuous, there’s a problem with your microwave’s magnetron.

Internal arc-over
This occurs when gas forms within the magnetron. When the energy is delivered suddenly and the gas was maintained within the magnetron, this will cause an internal arc-over.

Symptoms To Look For When The Magnetron Fails
Whenever a magnetron malfunctions, there are a few signs to look for:

There is no heating.
It smells like it’s on fire.
Sounds of arcing.
A snapping sound can be heard.
The disease is in the process of being eradicated when it comes to a halt. If you notice these signs while heating meals in your microwave, turn it off by disconnecting its main power source, and repair or replace the magnetron as soon as possible.

Repair/Replace The Magnetron
But which is better: replacing or repairing your magnetron in your microwave oven? It all depends on how badly the magnetron has been damaged. As a result, it is preferable to identify the issue first before deciding to replace or repair it.

Because magnetrons are costly to acquire, it’s fine if the issue is repairable; nevertheless, if the issue is serious, you’ll need to replace the magnetron with a new one. When a repair is done incorrectly, the problem can resurface.

If you wish to replace your magnetron with such a new unit, get a skilled technician to do so. Because there will be a residual of power in your magnetron that can produce shock.

How Does A Magnetron Work
However, do you understand how a magnetron tends to work? The microwave, in general, uses a magnetron to convert electrical power into microwave energy. One vacuum tube that has a hollow anode rod that has cavities and a cathode rod in the center surrounds this magnetron.

The electrons warm up this cathode rod as electricity passes across it. The electrons are excited towards the anode by the cathode rod that is heated. As a result of this magnetic field, these electrons prefer to proceed in a curving rather than a straight path towards the anode.

Those curved electrons have a tendency to interact with the anode’s cavities. These resonations occur at a frequency that is equal to that of microwaves. As a result, the antenna generates microwaves for the magnetron.

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