Microwave Sparking Inside
You see sparks or arcing inside the microwave during operation.
Common Causes
Damaged waveguide cover, metal in cavity, worn turntable coupling, deteriorated interior paint.
DIY Troubleshooting Steps
Stop immediately.
Check for metal.
Inspect waveguide cover.
Check interior walls.
Don't want to troubleshoot?
Book a repair and we'll handle it. Free diagnostic with approved repair.
When to Call a Professional
If the waveguide cover is damaged or sparking continues. Stop using the microwave.
Get expert answers in 15 minutes
A live video diagnosis tells you exactly what's wrong, what parts you need, and whether it's worth fixing. $49.
Frequently Asked Questions
Why is my microwave sparking inside?
Damaged waveguide cover, metal in cavity, worn turntable coupling, deteriorated interior paint.
How much does it cost to fix a microwave that is sparking inside?
Typical repair costs range from $80–$200. Free diagnostic with approved repair.
Can I fix a sparking inside microwave myself?
If the waveguide cover is damaged or sparking continues. Stop using the microwave.
Estimated Repair Cost
$80–$200
Free diagnostic with approved repair. Price varies by brand and model.
Need Help Now?
Same-day service available. 90-day parts & labor warranty.
Call (877) 378-3111Video DiagnosisOther Microwave Issues
View all microwave problems →Microwave Sparking Inside — By City
Get city-specific help for this issue in your area.
Ready to get it fixed?
Book same-day repair or call us. Free diagnostic with approved repair.