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HomeRepair HelpMaytag Microwave RepairMaytag Microwave is loud or noisy Repair
Maytag Microwave is loud or noisy
If your Maytag microwave is making a loud noise, the sound can help identify the failing part. A worn microwave fan motor is the most likely cause, especially if you hear rumbling or squealing while the fan runs. A damaged magnetron may produce a high-pitched sound, growling, or unusually loud buzzing instead of its normal low hum. Test the high-voltage diode before replacing the magnetron, since a defective diode can make the magnetron noisy. The exhaust fan motor is another possibility, particularly if the noise comes from the vent system. If the noise occurs only while the glass tray turns, inspect the glass tray support, roller guide, and other turntable components for worn rollers. A worn stirrer motor can also cause grinding or humming as its internal gears fail. These repairs may require opening the microwave cabinet. The high-voltage capacitor can store a lethal charge even after the microwave is unplugged, so it must be properly discharged before any interior work. Magnetron, high-voltage diode, and other high-voltage repairs should be handled by a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Maytag microwave model number to find the exact replacement part for your appliance.
01 - Maytag Microwave Fan Motor
The fan motor bearings can wear out causing a rumbling or squealing noise. If the fan motor is making noise when its running it will need to be replaced.
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02 - Maytag Microwave Magnetron
The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Under normal circumstances, the magnetron emits a low hum. However, if the magnetron is damaged or nearly burned out, it may begin emitting high-pitched sounds or growling noises. If the magnetron is noisy, this indicates that the magnetron is nearing the end of its life or might be defective. A defective high-voltage diode can also cause the magnetron to be loud. Before replacing the magnetron, first test the high voltage diode. If the diode is not defective, replace the magnetron. (Warning: The microwave oven c...
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03 - Maytag Microwave Diode
The diode converts the AC power output of the transformer to DC, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron to heat the food. A failing diode can be responsible for a noisy magnetron. When the diode fails, it is often visibly burned out. Inspect the diode and if the diode is burned out, replace it. If inspecting the diode proves inconclusive, test it with a multimeter that uses a 9-volt battery or put a 9-volt battery in series with the diode. When the leads are reversed, the diode should only have continuity in one direction.
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04 - Maytag Microwave Exhaust Fan Motor
To determine if the fan motor is defective, remove the fan motor from the microwave and try turning the fan blades by hand. If the blades do not turn freely, replace the fan motor. If the fan blades do turn freely, use a multimeter to test the motor for incoming power and for continuity. If the motor has power but won’t run, replace it. If the motor does not have continuity, replace it.
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05 - Maytag Microwave Glass Tray Support
The microwave glass tray support is the component that sits under the glass turntable tray to support the tray as it rotates. Over time, the small rollers on the support can wear out and start making a noise as the tray turns. If you've determined the glass tray support is the source of the noise, the part should be replaced with a new one.
Highly Likely
06 - Maytag Microwave Stirrer Motor
The stirrer is a metal blade which slowly rotates inside in the microwave. As the stirrer turns, it deflects the microwave energy randomly throughout the microwave. As the stirrer motor wears down, it begins to make grinding noises. To determine if the stirrer motor is worn out, check to see if voltage is getting to the motor. If the motor has the proper voltage, but is noisy or won’t turn, replace it. (Note: Proper voltage can be determined by reading the label on the motor. Because the stirrer motor is a geared motor, the shaft will not spin freely.)
Highly Likely
Frequently Asked Questions
Why is my Maytag microwave making a loud buzzing or grinding noise?
Is a noisy Maytag microwave dangerous to use?
How do I test a Maytag microwave fan motor or exhaust fan motor?
Why does my Maytag microwave make noise only when the turntable is spinning?
How can I find the correct replacement part for my noisy Maytag microwave?
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