Why does a fuse blow in a microwave?

A sudden failure of a microwave oven is a rather unpleasant occurrence. But don't rush to get upset. Perhaps it's just the fuse.

Fuse - an integral part of any household appliance.

It's in the microwave serves to interrupt power supply if an internal breakdown occurs. Its absence could cause a short circuit, causing the devices to catch fire.

The fuse in the microwave has blown

A clear sign indicating such a breakdown is complete absence of visual and noise effects (the display does not light up, nothing buzzes). This indicates failure main fuse, in the power supply.

There can be up to three of them in total.

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

Third stoves are supplied with electronic units controls, which are powered, as a rule, via a separate branch.

Why do fuses blow in a microwave?

There can be many reasons.Let's look at some of them.

Malfunction of individual parts

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

Its role is played by microswitches.

The door has pushers that bring them to the desired position. If these parts do not work correctly and the fuse link may burn out.

Contact disappeared

Malfunction of switches is often caused by deposited grease, burnt or broken connecting contacts, erasing the mechanical pusher.

Closure

Closure power transformer is another reason for 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?

What to replace

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

You can buy it in radio parts or electrical goods stores. They are marked according to the maximum available load current.

ADVICE: To avoid mistakes, take the faulty one with you for a sample or read its markings.

If you are not sure that you will select the new part correctly, you can contact a specialist. It is guaranteed to return all functions to the kitchen appliance.

How to fix the problem yourself

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

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

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

• If you decide to fix the problem yourself, then first of all you need to use a screwdriver remove the back cover.
• After removing the protective cover, remove the fuse. It is usually located at the base of the power wire.
• If obvious signs of burnout are visible, you will have to install another.
• In the absence of visual signs call with a multimeter for integrity.
• After replacement check the functionality of the oven.

Other troubleshooting methods

• If it happened re-burnout, then you need to pay attention to serviceability the above switches. First of all, make sure that they are fully pressed by the pushers. It happens that the base bends and the elements are not included. If necessary adjust location.
• Worth checking out 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 of the contact inside. To eliminate the cause, cleaning or replacement with a new one is required. The parts are easy to understand, so it won’t be difficult to decide what to do.
• 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 closed plastic holder. We extract and call her. If a malfunction is detected, we replace it with the same one, taking into account the current strength.
• If the equipment still does not work, you need to check the insertion in the control unit circuit or exchange it for a known whole one. The lack of voltage here makes it impossible to start the microwave oven.

Useful tips for replacing a blown fuse.

• Troubleshooting by dividing the process into logical stages significantly reduces the time to identify a breakdown.
• Work begins with an analysis of the current state of the deviceconnected to the network.
• The presence of a working indication on the display indicates a malfunction in magnetron circuits.
• No backlights may be caused interrupted by local voltage or a breakdown in the power supply circuit.

Attention! After replacement and test runs, do not forget to remove the plug from the network. Live repairs are dangerous.

It is possible that repeated burnouts will occur after replacement. In this case, check the limit switches as described above. To eliminate other faults, more in-depth knowledge and practical skills are required.

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