What commonly causes microwave sparks inside?
For a microwave with this symptom, the most relevant component families are Waveguide cover / mica sheet, Stirrer cover / antenna cover, Rack support / rack, Cavity paint / cavity surface, Magnetron antenna.
Component families associated with this symptom
These are component types commonly connected with this malfunction. They are not model-specific part-number recommendations.
Waveguide cover / mica sheet
A burned or contaminated waveguide cover can arc inside the cavity.
Stirrer cover / antenna cover
Damaged covers near the microwave energy path can cause arcing.
Rack support / rack
Damaged coated metal supports can arc.
Cavity paint / cavity surface
Exposed metal from damaged cavity coating can spark.
Magnetron antenna
A damaged magnetron antenna can produce arcing near the waveguide.
Enter your model number
We will use this symptom knowledge to look only for verified-fit parts for your model that match the relevant component functions.
Functions being matched: Waveguide cover / mica sheet, Stirrer cover / antenna cover, Rack support / rack, Cavity paint / cavity surface, Magnetron antenna