GE Microwave: arcing

Professional Repair Guide

What is this symptom?

If you're experiencing arcing in your GE microwave, you may see visible sparks or electrical flashes inside the cavity, often accompanied by crackling sounds or a burning smell. This issue can arise with or without metal objects present and can indicate serious problems with the microwave's components. Prompt attention is essential to prevent further damage.

Urgency: Critical

Possible Causes

Damaged or contaminated waveguide cover

How to Identify: Burn marks or scorching on the waveguide cover, visible cracks or holes, arcing repeatedly in the same localized area regardless of food placement

Part: Waveguide cover (mica or plastic)

Faulty high‑voltage components (magnetron, diode, capacitor)

How to Identify: Arcing accompanied by burning smell, smoke, or failure to heat; symptoms persist after exterior causes ruled out

Part: Magnetron or high‑voltage diode

Next step

Choose the next step for arcing

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Based on diagnostic data

Most relevant component to inspect

Microwave Waveguide Cover

Protects the microwave waveguide opening from food splatter and moisture.

Typical part-only price: $8 - $30
DIY difficulty: Easy
Estimated time: 10-20 mins

Optional: enter your model number

Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Microwave Magnetron

Generates microwave energy for heating food and requires high-voltage service procedures.

$80 - $220 · Hard · 60-120 mins

Check fit & price

Model number required

Model-compatible Microwave parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Preventive Maintenance

Regularly clean interior and waveguide cover: Build‑up of debris and grease that leads to arcing
Frequency: weekly to monthly
Inspect interior paint/coating: Exposed metal surfaces that can cause arcing
Frequency: monthly

Frequently Asked Questions

Why is my GE Microwave arcing?

Arcing can occur due to a damaged waveguide cover or faulty high-voltage components like the magnetron.

How do I fix GE Microwave arcing myself?

No DIY solutions are recommended for this issue, as it requires professional assessment.

How much does it cost to fix arcing?

Repair costs can vary widely based on the issue, so consult a technician for an accurate estimate.

When should I call a technician for arcing?

You should call a technician immediately if you notice arcing, as it indicates a critical issue.

References & Sources

GE Microwave - Arcing or Making Sounds - GE Appliances Official
Microwave Sparking & Arcing Safety Guide Community

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

Damaged magnetron (2 mentions)
Scorch marks on magnetron cover (2 mentions)

User Suggested Solutions

Clean scorch marks on the magnetron cover
Replace the damaged magnetron and clean the waveguide

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

Community Discussions

arcing electricity

Cleaned scorch marks on the magnetron cover, which resolved the arcing issue.

DIY View on Reddit →

arcing noise from magnetron antenna

Replace the damaged magnetron and clean the waveguide; consider replacing the waveguide cover.