The Magnetron is an OEM part for Frigidaire microwave ovens. Located behind the waveguide plate inside the microwave chamber, the magnetron generates electromagnetic waves to cook and heat food. Powered by a high-voltage transformer, a magnetron coil focuses 2.45GHz radio waves through the waveguide into the cavity. Causes of a bad magnetron can include failures of the cathode filament or insulator over extended use, depletion of filament or high voltage components. Symptoms of a bad Magnetron include: Slow or incomplete cooking even on high power  Discolored or burnt spots on food No visible arcing yet cavity runs continuously Oversparking sounds or burning smells from chamber This genuine OEM Frigidaire magnetron is compatible with Electrolux, Gibson and some Kenmore microwave models as well.5304519335 (AP6834680) replaces 5304464072, 5304472445.