Customer Questions and Answers for Magnetron Assembly (Microwave) by Whirlpool

This microwave magnetron generates the RF energy that heats food. If your unit runs but won't heat—or makes a loud hum—the magnetron may be at fault. Replace this assembly to restore dependable heating.

• Produces microwave energy as part of the high-voltage system to heat food
• Typical failure symptom: runs but does not heat
• Loud humming or buzzing during a cook cycle
• Burning smell, arcing, or scorch marks near the waveguide/magnetron
• Trips the breaker or blows an internal fuse at start when shorted

What's included: 1 magnetron assembly Installation notes:

• Disconnect power before service; the high-voltage capacitor can retain a dangerous charge—discharge it properly
• Note wire orientation and mounting; transfer any original brackets/insulators as required; install in the same orientation
• Handle by the body only; do not touch or chip the ceramic antenna
• Inspect the waveguide and cavity cover for signs of arcing and correct any damage before use

Before you buy: No-heat can also be caused by the high-voltage diode, capacitor, transformer, or door switches. Diagnose to ensure the magnetron is the failed component.