Kitchenaid Microwave Making a Loud Noise? How To Fix It

September 6, 2022
Microwave Repair

Reason 1: The magnetron is failing

If your microwave is making a loud, humming noise, it could be because the magnetron is starting to fail. The magnetron is the part of the microwave that generates the heat. If it starts to fail, it can make a loud noise. You should replace the magnetron as soon as possible.

Important note:

The magnetron in a microwave is what produces the electromagnetic radiation that cooks your food. However, if this component is not working properly, it can pose a serious safety hazard. That’s why it’s important to have a qualified professional replace your magnetron if it needs to be replaced. 

Reason 2: The high voltage capacitor

Another reason your KitchenAid microwave might be making a loud noise is that the high voltage capacitor is failing. The high voltage capacitor helps to provide power to the magnetron. If it’s not working properly, it can make a loud noise. You should replace the high voltage capacitor as soon as possible.

Important note:

High voltage parts inside a microwave can hold a charge for months and pose a serious electrocution hazard, even when the appliance is unplugged. For this reason, it’s important to only have these parts repaired by a qualified professional. Take care not to get too close to the high voltage capacitor or magnetron—you could receive a painful shock even if the microwave is unplugged.

Reason 3: A dirty or damaged turntable

If your microwave is making a loud, clicking noise, it could be because the turntable is dirty or damaged. The turntable is what rotates the food inside the microwave.

If the turntable is dirty, this can cause the motor to work harder, which can make a loud noise. If the turntable is not level, it can also result in noises. Also, damaged rollers may not roll smoothly, leading to shaking noises. A chipped or cracked glass tray can also make the tray vibrate, creating more noises still. 

If you think your microwave turntable is causing a loud noise, try cleaning it or replacing it with a new one. If it’s damaged, it will need to be replaced.

Reason 4: Something in the door

If your microwave is making a loud, banging noise, it could be because something is blocking the door from closing properly. This could be a piece of food or even a dish towel. When the door is blocked, the microwave doesn’t know to stop running, and the food inside can start to overcook. Not only is this a fire hazard, but it can also damage the microwave. 

To prevent this from happening, make sure that there’s nothing blocking the door when you’re cooking. If you notice that the door isn’t closing properly, try cleaning the hinges and ensuring there’s nothing caught in them. You should also check that the seal around the door is intact.

Reason 5: A blocked or damaged fan

If your KitchenAid microwave is making a loud, screeching noise, it could be because the fan blade is hitting something. The fan blades are responsible for moving air through the microwave, and if they are damaged or obstructed, the airflow will be restricted. This can cause the fan to work harder, which can lead to a loud noise. In some cases, the fan blades may even come into contact with the microwave walls, which can also cause a loud noise. 

If you notice that your microwave is making a loud noise, it is important to check the fan blades for damage or obstruction. Damaged blades should be replaced. Any obstructions to the blades should be removed carefully and then you should clean the blades.

Reason 6: A bad transformer

If your KitchenAid microwave is making a loud, buzzing noise, it could also be because of problems with the transformer. The transformer converts the electricity from AC to DC. It is responsible for providing power to the magnetron, and if it is not working properly, the transformer can cause the magnetron to overheat and produce a loud buzzing noise. 

If you suspect that your transformer is the problem, unplug your microwave and check the transformer for signs of damage. If the transformer is damaged, you will need to replace it. Issues with the transformer can cause a loud noise. You should replace the transformer as soon as possible.

Reason 7: A damaged door switch

One final reason your KitchenAid microwave might be making a loud noise is that the door switch is damaged. The door switch prevents the microwave from starting when the door is open. It’s responsible for turning the microwave on and off, and is located near the door. 

When the door switch is damaged, it can cause the microwave to turn on and off erratically, which can cause a loud noise. It is best to consult with a qualified technician before attempting to replace a door switch. Trying to replace a door switch without proper training can result in further damage to the microwave.

Don’t mess with microwaves

If your microwave starts making loud noises, it’s important to take the issue seriously and consult a professional. Although the problem may sometimes be caused by a simple fix, only qualified individuals should conduct repairs.

Loud noise coming from your microwave is usually indicative of a bigger issue. If you ignore it, the problem will likely persist and potentially worsen over time. In some cases, continuing to use the microwave when it’s making strange noises can cause further damage. This not only puts your appliance at risk, but it could also pose a safety hazard to you and your family.

If all else fails… 

If your microwave is making loud noises, the best course of action is to unplug it and contact a professional for help. They will be able to diagnose the problem and recommend the best course of repair. Whether it’s something as simple as tightening loose bolts or replacing a major component, experts have the tools and experience necessary to get the job done right. Don’t take chances with your safety—if your microwave is acting up, call in a pro.


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