Microwave That’s Making Noises
Microwaves are a convenient and essential kitchen appliance in many households. However, like any appliance, they can develop issues over time. One of the most common problems is a microwave that’s making noises. This can be incredibly frustrating, especially when you’re in a hurry. In this blog post, we will discuss the possible reasons why your microwave is making noises and provide step-by-step instructions on how to fix it.
If you need to test an electrical component when making your repairs, more often than not, you will need a multimeter. You can pick one up here on Amazon
Possible Causes and Solutions
1. Microwave That’s Making Noises: Drive Motor
If the turntable on your microwave is making an unusual noise, the problem may be with the drive motor. Most microwave ovens with a glass tray use a motor-driven coupler to turn the tray or a roller guide.
How to Fix: The motor is typically located below the floor of the oven, and access will need to be through the bottom. The motor is normally held in place with a retaining screw and will have two wires attached to it as well. If the motor is making a grinding noise it will need to be replaced.
2. Microwave That’s Making Noises: Magnetron
If your microwave is making an unusual or loud humming noise, you may have a problem with the magnetron. This component is part of the high voltage circuit and provides the microwaves that generate the heat1.
How to Fix: Access to the magnetron will require removal of the cabinet. Disconnect the power and also discharge the high-voltage capacitor to prevent an electrical shock. You can then locate the magnetron and disconnect the two attached wires and the mounting screws to remove it. You should also check the high voltage diode to verify that it is not shorted before condemning the magnetron.
3. Microwave That’s Making Noises: Drive Coupler
If your microwave is making an unusual noise, the problem may be with the drive coupler for the turn tray. Most microwave ovens with a round glass tray use a motor-driven coupler to rotate the tray on a roller guide.
How to Fix: Remove the tray and roller guide from the oven and then inspect the coupler. Some models may require you to remove the motor from the bottom before you can pull the coupler off of the motor. The coupler normally has a D-shaped opening that fits tightly onto the motor shaft. If it is cracked or worn it may become noisy and will need to be replaced.
4. Microwave That’s Making Noises: Roller Guide
If your microwave is making an unusual noise when the turn tray is rotating, the problem may be with the roller guide under the tray. Some microwave ovens with a round glass tray use a motor-driven coupler to turn the roller guide.
How to Fix: Remove the tray and then inspect the roller guide. Check the hub to see if it engages the coupler securely and also the outer rollers for signs of cracks or damage. If there are signs of wear or damage, it should be replaced.
5. Microwave That’s Making Noises: High Voltage Diode
If your microwave is making an unusual or loud humming noise, you may have a problem with the high-voltage diode. This component is part of the high-voltage circuit along with the capacitor and the magnetron.
How to Fix: Access to the diode will require removal from the cabinet. Disconnect the power and also discharge the high-voltage capacitor to prevent an electrical shock. You can then locate the diode and use a multimeter to check for continuity. Reverse the meter leads to check for continuity in the opposite direction. There should be continuity in only one direction and if not, it will have to be replaced.
6. Microwave That’s Making Noises: Cooling Fan
If your microwave is making an unusual noise, the problem may be with the cooling fan. The cooling fan is located inside the cabinet and is used to cool the magnetron.
How to Fix: Disconnect the power and then remove the cover and locate the fan assembly. Inspect the housing for any foreign objects that may contact the fan blades and then check the fan for any signs of damage or wear and replace if necessary.
In conclusion, if your microwave is making noises, it could be due to a number of issues, from a faulty drive motor to a problem with the magnetron or high-voltage diode. By understanding these common problems and how to troubleshoot them, you can keep your microwave in good working order.
For more detailed instructions on how to repair or replace parts in your microwave, check out our other blog posts or contact us for professional assistance.
Note:
Repairing a microwave at home can pose significant dangers if not approached with caution and expertise. Microwaves are complex appliances that operate on high voltages and contain potentially lethal electrical components. Opening up a microwave without proper knowledge and training can expose individuals to the risk of electric shock or severe burns. Additionally, microwaves emit harmful radiation, and tampering with the internal shielding can lead to exposure to dangerous levels. Moreover, improper handling or incorrect reassembly of the microwave can result in fire hazards, as microwaves generate heat to cook food.
Happy DIY’ING
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