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HomeRepair HelpGibson Microwave RepairGibson Microwave is sparking or arcing Repair
Gibson Microwave is sparking or arcing
If your Gibson microwave is sparking or arcing, stop using it and unplug it before inspecting the oven. The most likely cause is a damaged or loose waveguide cover, especially when the microwave waveguide cover is sparking inside the cavity. Replace the cover if it is burned, cracked, or will not stay in place. If the microwave sparks when running in the cabinet area, inspect the door switches, including the primary, secondary, and monitor switches, for burn marks or damage. A damaged magnetron or high-voltage diode can also cause microwave arcing behind the waveguide cover or in the cabinet, often with smoke or a burning smell. Less common causes include burned shelf supports and chipped interior paint that exposes metal. Replace damaged supports, or sand and apply microwave oven touch-up paint to small areas of exposed metal. Repairs involving the magnetron or high-voltage diode, or any repair requiring the outer cabinet to be opened, are hazardous because the high-voltage capacitor can store a lethal charge even after the microwave is unplugged. Proper capacitor discharge is required, so use a qualified technician if you are not familiar with the procedure. Enter your Gibson microwave model number to find the exact replacement part for your appliance.
01 - Gibson 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 - Gibson 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 - Gibson 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 - Gibson 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 - Gibson 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 - Gibson 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 Gibson microwave sparking inside?
Is a microwave sparking or arcing dangerous?
How do I test a Gibson microwave door switch or diode?
Should I replace the magnetron if my microwave is sparking?
How do I find the correct Gibson microwave waveguide cover or other replacement part?
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