Why the fuse in the microwave burns out - all possible reasons

The sudden failure of the microwave is a rather unpleasant phenomenon. But do not rush to be upset. Perhaps the matter is only in the fuse.

Fuse - an integral part of any household appliances.

In the microwave, he serves to interrupt power when an internal breakdown occurs. Its absence could cause a short circuit, which causes the ignition of devices.

The fuse in the microwave has blown

An obvious sign indicating such a breakdown is complete absence of visual and noise effects (the board does not light, nothing buzzes). This indicates a failure main fusein the power supply.

In total there can be up to three pieces.

Second situated in high voltage circuit and protects the supply transformer from overloads from the magnetron.

Third furnaces are supplied with electronic components controls that are powered, as a rule, on a separate branch.

Why do fuses blow in the microwave?

There can be many reasons. We will understand some of them.

Impaired performance of individual parts

To prevent the device from turning on with the door open, protection is provided.

Its role is played by microswitches.

The door has pushers leading them to the desired position. In case of incorrect operation of these parts and fuse can burn.

Contact has disappeared

Malfunctioning switches often cause delayed fat, burning or breaking of the connecting contactserasing a mechanical pusher.

Short circuit

Short circuit Power transformer is another cause of the defect.

Burnout also causes a malfunction of the magnetron or capacitor of the high voltage circuit.

What to do if the fuse is broken?

How to replace

Instead of a damaged part, you can install only an element that has the same data and capabilities.

You can buy it in stores of radio components or electrical goods. They are marked by the maximum available load current.

TIP: In order to avoid errors, take the defective with you for the sample or read its marking.

If you are not sure that you will pick up a new part correctly, you can contact a specialist. He is guaranteed to return all functions to the kitchen device.

How to fix the malfunction yourself

You can try to fix the device yourself, saving time and money.

In this case, a minimum set of tools and basic knowledge in electrical engineering are required.

Attention! Be sure to unplug the power cord from the outlet before starting repairs.

• If you decide to fix the malfunction on your own, the first thing you need to do with a screwdriver is remove the back cover.
• Removing the protective cover, take out the fuse. It is usually located at the base of the supply wire.
• If you see clear signs of burnout, you’ll have to set another.
• In the absence of visual signs call with a multimeter on integrity.
• After replacement check the operation of the furnace.

Other troubleshooting methods

• If happened re-burnoutthen you need to pay attention to serviceability the above switches. First of all, make sure that they are fully pushed by the pushers. It happens that the base is unbent and the elements are not included. If necessary adjust location.
• Worth making sure in an instant change of position push button when opening the door. A slight delay caused by fat deposits melts the insert, which affects the performance of the device.
• The next possible reason is this is burning and sticking contact inside. To eliminate the cause, stripping or replacement with a new one is required. Details are easily disassembled, so it will be easy to determine the actions.
• If the main fuse is intact, and the microwave does not work, you must check the insert in the high voltage circuit. It is located in a plastic holder of a closed type. We extract and call her. If a malfunction is detected, change to the same, taking into account the current strength.
• If even now the equipment does not work, you need check insert in control unit circuit or exchange it for a known whole. The lack of voltage here makes it impossible to start the microwave.

Useful tips for replacing a blown fuse.

• Troubleshooting by dividing a process into logical steps significantly reduces the time to identify breakdowns.
• Work begins with an analysis of the current state of the deviceconnected to the network.
• The presence of a working display on the board indicates a malfunction in magnetron chains.
• Lack of backlight may be caused interrupted by local voltage or breakdown in the power supply circuit.

Attention! After replacement and trial runs, do not forget to remove the plug from the network. Live repair is dangerous.

Perhaps, after the replacement, repeated burnouts will occur. In this case, check the limit switches as described above. To eliminate other malfunctions, deeper knowledge and practical skills are needed.

It is better to contact a service center. Experienced and qualified specialists will repair equipment and carry out preventive maintenance.