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HomeRepair HelpSanyo Microwave RepairSanyo Microwave is sparking or arcing Repair
Sanyo Microwave is sparking or arcing
When a Sanyo microwave is sparking, sparking inside, or arcing when running, stop using it and unplug it. The most likely cause is a damaged or loose waveguide cover, especially if the microwave waveguide cover sparks in the oven cavity. Replace the cover if it is burned, cracked, or will not stay in place. Arcing in the cabinet area, rather than inside the cavity, can indicate a failed door switch with burn marks or other damage. A damaged magnetron or high-voltage diode can also cause cabinet arcing, smoke, or a burning smell. Less common causes include burned shelf supports or chipped interior paint that exposes metal. Any repair that requires opening the outer cabinet must be handled carefully because the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. The capacitor must be properly discharged before interior work, and repairs involving the magnetron or high-voltage diode may require a qualified technician if you are not familiar with capacitor discharge procedures. Enter your Sanyo microwave model number to find the exact waveguide cover, door switch, magnetron, diode, shelf support, or touch-up paint replacement part for your specific appliance.
01 - Sanyo Microwave Waveguide Cover
The waveguide cover might be damaged and arcing or burning. If this is the case or if the cover will not stay in place, replace it with a new one.
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02 - Sanyo Microwave Door Switch
If the microwave is sparking or arcing in the cabinet area, and not in the oven cavity, you will likely see smoke or there will be a burning smell. One of the appliance's door switches could have shorted and is causing the sparking or arcing. You should inspect each door switch for burn marks or damage and test the components with a multimeter to determine if any the door switches are malfunctioning.
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03 - Sanyo Microwave 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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04 - Sanyo Microwave Diode
If the microwave is sparking or arcing in the cabinet area, and not in the oven cavity, you will likely see smoke or there will be a burning smell. The appliance's diode is one of the components that could be damaged and causing the sparking or arcing. 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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05 - Sanyo Microwave Shelf Support
Some microwave ovens will have cooking shelf supports on the interior walls. Inspect the shelf supports for any burnt spots or damage. If there are any burnt or damaged spots, replace with new supports as needed.
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06 - Sanyo Microwave Touch-Up Paint
The paint on the interior of the microwave might be chipped. If the paint is chipped, the interior metal will be exposed, causing the microwave to spark or arc. Check the interior of the microwave for any spots where the paint has chipped away. If there are any damaged spots, gently sand the compromised area and touch them up with microwave oven interior paint.
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Frequently Asked Questions
Why is my Sanyo microwave sparking inside?
What causes a Sanyo microwave to spark in the cabinet area?
Is it safe to use a Sanyo microwave that sparks or smells like burning?
Can I replace the Sanyo microwave waveguide cover myself?
How do I find the correct Sanyo microwave waveguide cover or door switch?
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