The Most Common Parts that can Break on a Microwave

Pioneer Appliance
November 20, 2023
Microwave Repair

The microwave oven is an essential and convenient appliance found in kitchens worldwide. Its ability to quickly heat, cook, and defrost food has revolutionized modern cooking. However, like any electronic device, microwaves are susceptible to wear and tear, and certain parts can break over time with regular use. Understanding the most common parts that can malfunction in a microwave can help users identify issues early on and seek timely repairs or replacements. In this article, we’ll explore the key components that are prone to breaking and discuss some maintenance tips to prolong the life of your microwave.


The magnetron is the heart of a microwave oven. It is responsible for generating the electromagnetic waves that heat the food. Over time, the magnetron’s performance can degrade due to extensive use, leading to uneven heating or complete failure. Common signs of a failing magnetron include strange noises during operation or the microwave not heating food properly. Unfortunately, repairing or replacing a magnetron is a complex task and is best left to professional technicians.

Door switches and latches

The door switches and latches play a crucial safety role in microwaves. When the microwave door is opened during operation, these switches should cut off power to the magnetron, preventing accidental exposure to microwave radiation. Frequent door opening and closing can wear out the switches and latches, leading to issues where the microwave won’t start or stops functioning when the door is opened. These components are relatively easier to replace and should be addressed promptly to ensure safe operation.

Turntable and motor

The turntable is the rotating glass plate inside the microwave that ensures even cooking by distributing the microwaves uniformly. The motor responsible for turning the turntable can wear out over time or get clogged with food debris. A malfunctioning turntable can result in unevenly cooked food. Regularly cleaning the turntable and ensuring the motor is in good condition can prevent potential issues.

Control panel and keypad

The control panel and keypad are the user interfaces of a microwave oven. They allow users to set cooking times, power levels, and perform various functions. With frequent use, the buttons on the control panel may become unresponsive or start to wear out, making it challenging to input commands accurately. Keeping the control panel clean and handling it with care can help prolong its lifespan. In case of malfunctions, replacing the control panel or keypad is typically necessary.

High voltage capacitor and diode

The high voltage capacitor and diode work in tandem to convert the electrical power from the transformer into the high-voltage power needed by the magnetron. When these components fail, the microwave may experience issues such as no heating, loud buzzing sounds, or sparks inside the oven. These components deal with high voltages even when the microwave is unplugged, so it’s crucial to let a qualified technician handle any repair or replacement related to the high-voltage circuit.


Microwave ovens are convenient and essential appliances in modern kitchens, but they are not immune to breakdowns and malfunctions. Understanding the most common parts that can break in a microwave, such as the magnetron, door switches, turntable, control panel, and high voltage components, can help users identify issues early and seek professional repairs or replacements. Regular maintenance and gentle handling can significantly extend the lifespan of your microwave, ensuring it continues to serve you well for years to come. Remember, for any repair work involving high voltage components, always consult a qualified technician to ensure safety and proper functioning.

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