Whirlpool Inverter Magnetron (W11578959)

The Whirlpool Inverter Magnetron is the core component of your microwave that generates the microwave energy used to heat and cook food. It works by converting electrical power from the inverter board into high-frequency microwave radiation, which is directed into the cooking cavity to heat food quickly and evenly.

The Whirlpool Inverter Magnetron can fail from age, overheating, arcing caused by metal in the microwave, or prolonged use at high power levels. Internal components like the filament or antenna can wear out over time, and damage to the magnetron often results in a microwave that runs but no longer heats food properly.

These symptoms may indicate your magnetron needs to be replaced:

- Microwave runs but does not heat food at all

- Food heats unevenly or takes much longer than normal

- Loud buzzing or humming sound during operation

- Burning smell or visible scorching inside the microwave cavity

- Microwave trips the circuit breaker or blows a fuse repeatedly

- Sparking or arcing inside the microwave with no metal present

- Display and turntable work normally but no heat is produced