Customer Questions and Answers for Magnetron (Microwave) by Whirlpool

This microwave magnetron is the RF power tube that creates the microwaves that heat food. Replace it to restore normal heating when the oven runs but food stays cold or warms inconsistently.

• Generates microwave energy from the high-voltage system to cook food
• Common fix for: runs but doesn't heat
• Can help resolve loud humming/buzzing from the high-voltage section

• Unplug the appliance; the high-voltage capacitor can retain a dangerous charge—discharge it properly before service
• Install in the same orientation; tighten mounting screws evenly and reconnect leads securely; avoid touching the ceramic antenna—handle by the frame
• After reassembly, test with a microwave-safe water load; never operate the oven empty