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HomeRepair HelpEstate Microwave RepairEstate Microwave is sparking or arcing Repair
Estate Microwave is sparking or arcing
If your Estate microwave is sparking or arcing, stop using it and unplug it before inspecting the oven. The most likely cause is a damaged, burned, or loose waveguide cover, especially when the microwave sparks inside the cooking cavity. If the sparks occur in the cabinet area instead, a shorted door switch, such as the primary, secondary, or monitor switch, may be responsible. Other possible causes include a damaged magnetron or high-voltage diode, which may show burn marks and can produce smoke or a burning smell. Also inspect the interior shelf supports for burned spots and check the cavity walls for chipped paint exposing bare metal. Replace damaged parts, and use microwave-safe touch-up paint for small interior paint repairs. These DIY fixes for an Estate microwave that is sparking may resolve microwave sparking, microwave sparking inside, microwave arcing, or a microwave that sparks and pops. Any repair requiring removal of the outer cabinet involves a high-voltage capacitor that can store a lethal charge even after the microwave is unplugged. The capacitor must be properly discharged before interior work, so use a qualified technician if you are not familiar with safe discharge procedures. Enter your model number to find the exact replacement part for your Estate microwave.
01 - Estate 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 - Estate 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 - Estate 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 - Estate 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 - Estate 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 - Estate 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 Estate microwave sparking inside?
Can I replace the waveguide cover if my microwave is sparking?
Why is my Estate microwave arcing in the cabinet area instead of the oven?
How do I know whether the magnetron or diode is causing the sparking?
How do I find the correct Estate microwave waveguide cover or other replacement part?
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