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Cause: Food or grease left inside the microwave can carbonize and spark.
Fix: Clean the inside thoroughly with a damp cloth and a bit of baking soda or vinegar.
Broken or Worn Components:
Cause: A damaged turntable motor or internal part may cause arcing.
Fix: If internal parts are faulty, it's best to stop using the microwave and have it checked by a technician.
What You Should Do:
Unplug the microwave immediately to avoid further damage or fire risk.
Inspect the interior for any metal, burnt food, or visible damage.
Clean it thoroughly if food residue or grease is present.
Do not use it again until you’re sure it's safe. If you’re unsure, contact a professional repair technician or consider replacing the microwave.
When to Replace the Microwave:
If sparking continues after cleaning and removing metal.
If internal parts (like the waveguide cover or magnetron) are damaged.
If the microwave is old and out of warranty—repair may cost more than replacement.
Bottom line: Sparking is a serious warning sign. Always take it seriously and stop using the microwave until you've identified and resolved the issue. If in doubt, have it checked professionally or replace it.
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