Customer Questions and Answers for High-Voltage Diode Kit (Microwave) by Frigidaire

This microwave high-voltage diode kit converts AC to DC in the high-voltage circuit so the magnetron can heat. Replacing a failed diode often restores heating performance. What it does:

• Rectifies high-voltage AC to DC for the magnetron
• Completes the high-voltage circuit with the transformer and capacitor
• Common failure symptoms include running but not heating, loud humming/buzzing, or blowing a fuse/tripping a breaker at start
• Visual clues can include cracking, swelling, or burn marks on the diode

• One high-voltage diode

• Disconnect power before servicing; microwaves can retain lethal voltage even when unplugged
• Properly discharge the high-voltage capacitor before handling components; use insulated tools and approved procedures
• Note diode orientation/polarity and mounting; install exactly as the original