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

This magnetron is the high-voltage tube that generates microwave energy to heat food in compatible countertop and over-the-range ovens. Replacing a failing magnetron restores cooking performance and stops warm-only or no-heat operation. What it does

• Converts high-voltage electrical energy into microwave radiation for food heating
• Commonly related to ovens that produce no heat, very weak heat, or intermittent heating
• Can cause unusual humming, arcing/sparking inside the cavity, or burnt-odor symptoms if failing
• Works with the oven's high-voltage assembly and waveguide to distribute microwave energy

• Disconnect power and unplug the appliance before any service—high-voltage components can retain a lethal charge
• Handle the magnetron carefully; avoid touching terminals or the antenna to prevent damage