What are the reasons why the microwave oven cannot start?

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Microwave oven is one of the indispensable appliances in modern kitchen, and its convenient and efficient heating function provides great convenience for daily life. However, when the microwave oven suddenly fails to start, it often brings trouble to the user. This article will systematically analyze several common reasons why microwave ovens cannot be started from a scientific point of view, and provide corresponding solutions to help readers understand and deal with these 1 common home appliance failures.

(1)、Loose power cord

1. cause analysis

Long-term frequent use will make the plug and socket connection loose, the power cord wear, bending serious internal circuit fracture, so that the equipment can not be normal power.

2. solution

①. Check whether the power cord plug is fully inserted into the wall socket to ensure that the connection is stable. If the plug is loose, try to replace the other socket test.

②. Carefully observe the appearance of the power cord, focusing on the connection parts near the plug and the fuselage for obvious damage. Once the skin is found to be broken or the wire is exposed, immediately stop using it and replace it with the original wire.

(2)、partial short circuit or circuit fault

1. reasons

When the circuit board is affected with moisture, the components are aging or encounter voltage impact, a local short circuit or open circuit may be formed, triggering the self-protection mechanism of the device, causing the whole machine to fail to start.

2. fault performance

Press the start button without any response, or the device instantaneous power off.

3. solution

In view of the existence of high-voltage components inside the microwave oven, non-professionals should not disassemble and repair themselves. It is recommended to contact professional maintenance personnel for testing and maintenance. Regular cleaning of the external vents of the microwave oven and keeping the use environment dry can prevent such problems to a certain extent.

(3)、Control panel exception.

1. abnormal performance

The failure of the control panel may be manifested as unresponsive keys, unlit display, or abnormal display.

2. cause analysis

①. Hardware failure: film key aging or adhesion, internal cable loosening, oxidation, or main control chip, capacitor and other components damage.

②. Physical damage: frequent pressing or liquid infiltration leads to short circuit, contact failure, panel bump may also cause abnormal display.

③. System problems: Power fluctuations or program errors can cause the system to crash, making the panel unresponsive or displaying error codes.

3. Solution

①. Basic troubleshooting: Power off the microwave oven and restart it. After standing for a few minutes, power on again and try to let the system recover by itself.

②. Cleaning inspection: clean the surface of the panel after power off, and check whether the key is stuck.

③. Component Replacement: If the key or display is abnormal, the control panel module or related circuit components may need to be replaced.

④. Professional maintenance: If the problem is complex or involves motherboard failure, it is recommended to contact after-sales or professional personnel for inspection and maintenance.

(4)、Fuse blowing protection

1. reasons

The internal circuit of the microwave oven is usually provided with a fuse device, which is used to fuse when the current is abnormal to protect the core components. When there is overload, short circuit or voltage mutation in the circuit, the fuse will be blown due to overheating, thus cutting off the power supply of the whole machine.

2. solution

While ensuring a complete power failure, check the status of the fuse located at the rear or inside the microwave oven. If the fuse is confirmed, replace the fuse that meets the original specifications.

Note: Fuse is often the appearance of deeper problems, if the replacement of the fuse again, it indicates that the equipment has other faults, the need for further maintenance.

(5)、Chain switch failure

1. reasons

The door lock system of the microwave oven is an important safety device. It can only be activated when the door is completely closed through multiple micro switches. Long-term use may cause oxidation of the switch contact points, fatigue of the spring sheet or wear of the mechanical structure, causing the system to misjudge that the door is not closed and prohibit starting.

2. solution

①. Carefully check whether the microwave oven door is tightly closed to ensure that there is no gap. Gently move the door lock mechanism to check whether it operates flexibly without jam.

②. Wipe the door frame and door lock contact parts carefully with a soft and clean cloth to thoroughly remove food residue and oil.

③.If the door lock is found to be damaged, contact the after-sales professional for maintenance or replacement.

Conclusion

The failure of the microwave oven to start often stems from a variety of factors, from simple loose power cord to complex internal circuit problems, we need to be patient. Regular maintenance, proper use and timely professional help are the key to extending the life of the equipment. I hope that the analysis and recommendations of this article can provide you with a practical reference, so that the microwave oven continues to be a reliable and good helper in your kitchen.