Customer Questions and Answers for Magnetron (High-Voltage Microwave Tube) by Whirlpool

This magnetron is the microwave's high-voltage tube that generates the microwaves responsible for heating food. Use it as a direct replacement when your microwave powers on but no longer heats properly. What it does:

• Generates the microwave energy that heats and cooks food inside the oven cavity.
• A failing magnetron commonly causes the oven to run but not heat; other signs can include weak or uneven heating.
• Can produce unusual humming, arcing or sparking inside the cavity, or a burning smell when failing.
• Works as part of the high-voltage circuit; other components affect overall function.

• Disconnect power and unplug the appliance before servicing; the high-voltage capacitor must be safely discharged.
• Handle the magnetron carefully by the mounting flange—avoid touching the ceramic antenna or terminals.
• Verify exact part number compatibility with your model before ordering; some repairs require replacing other high-voltage components.