Microwave Sparking 6 Common Reasons and Fix It


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Once you are satisfied the oven area is clear of any metal objects, I suggest trying the microwave again, but without any contents. This will confirm the area is clear. If you then choose to continue with your original task of reheating food and the microwave sparks again, you can be sure the problem is being caused by your food container. 2.


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It is possible for a microwave to spark without metal being present if there is a build-up of static electricity. This can occur if the microwave is not properly grounded or if the air inside the microwave is very dry. Another possibility is that the microwave is damaged and needs to be replaced.


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1. Metal in the Microwave. The most common cause of microwave sparking is metal objects inside the microwave. Metal reflects microwaves and turns them into electricity, which causes sparks. This can happen if you accidentally leave a spoon, fork, knife, or any other metal utensil in your food when you heat it up.


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Remove the screw from the waveguide cover. Wash the area. Fix the new waveguide cover. 2. Worn Microwave Racks. If your Microwave has racks, they could be the reason for sparking or smoking. Microwave racks have metal covered with protective plastic to ensure no sparks or smoke forms on your appliance.


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Note: If your microwave is sparking after cleaning, please avoid using steel wool. Instead, opt for soft cloths or sponges. #3 Broken Waveguide Cover. If your microwave is sparking without metal, you'll want to keep reading. When the unit makes the microwaves that cook your food, it projects them through a little panel known as a waveguide.


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Carbonized Food Residue: Over time, food particles and grease can build up inside and form a carbonized residue. When microwaves interact with this residue, it can cause arcing and sparks, similar to how the metal would behave. Faulty Stirrer Fan: The stirrer fan's purpose is to distribute microwaves evenly throughout the oven.


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1. Clean the Interior. Food debris or grease buildup inside the microwave can cause sparking. Unplug the microwave and remove the turntable, roller ring, and other removable parts. Clean the interior of the microwave with a damp cloth and mild detergent. Be sure to dry it thoroughly before using it again. 2.


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Loose Metal Objects. One common reason for sparking in a microwave is the presence of metal objects inside. When metal comes into contact with the microwaves, it can create sparks. This can occur if you accidentally leave a metal utensil or aluminum foil inside the microwave while heating food. It's important to always double-check that there.


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Metal reflects microwaves and creates a concentrated area where electrical currents form. The concentrated energy can lead to sparking, or arcing. The presence of metal inside the microwave cavity can result in electrocution, or even a fire inside the microwave by igniting flammable materials inside the appliance.


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Sparking or arcing inside a microwave can be caused by several factors related to the door switch. One possible reason is that the door switch is not functioning properly, resulting in a faulty connection. When the switch fails to engage or disengage correctly, it can lead to electrical arcing or sparking.


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Reason #1: Metal or Microwave Rack. Sparks fly when a microwave meets metal. If you see sparks, disrupting the process as quickly as possible is vital. Forgetting a misplaced fork or aluminum foil covering can happen. However, the longer your microwave sparks, the higher the risk of irreparable damage and potential fire.


Microwave Sparking the 4 Most Common Causes of Sparks in a Microwave

A microwave uses a high level of electricity, which makes microwaves susceptible to sparking issues. Sparking microwaves are usually the result of metal fragments in the microwave or a problem with the waveguide cover. Both these problems are easily fixed. The next most common reason for a microwave sparking is a faulty diode.


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02 - Magnetron. If the microwave is sparking or arcing behind the waveguide cover in the oven cavity, you will likely see smoke or there will be a burning smell. The appliance's magnetron is one of the components that could be damaged and causing the sparking or arcing. Inspect the magnetron for burn marks or damage and replace if necessary.


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Now let's look at the 5 most common culprits behind microwave sparking. 1. Damaged Waveguide Cover. The waveguide cover is one of the most prone areas for sparking since any damage, warping, or gaps in this panel can allow leaks of microwave energy into the cavity. Metal fragments, grease buildup, and general wear and tear over time can all.


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The particles can turn into a form of carbon due to heat exposure, which can create conductive hot spots in the microwave, leading to sparking or arcing. This is pretty easy to prevent - keep your microwave clean by regularly wiping it down and ensuring you never heat or cook anything without a lid. 3. Microwaving Something Small.


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The electromagnetic waves bouncing around inside the microwave oven cavity will strike the metal object, producing a spark and a crackling sound. This is why it's important to only use microwave-safe plates and containers when heating up food or beverages. Decorative plates or mugs can potentially have metallic elements in the paint that will.