KitchenAid
Short or Overcurrent Under Load
Microwave runs for a few seconds then shuts off completely, sometimes resetting the clock.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Shorted high-voltage diode or capacitor, failing magnetron drawing excessive current, weak line fuse, failing noise filter board
How to Fix / Troubleshooting
High-Voltage and Electrical Safety: Unplug the microwave. Do not attempt to test high-voltage components unless trained.
- Observe behavior: Note whether the breaker trips or only the microwave shuts off.
- Inspect internal fuse: If the internal fuse blows repeatedly when starting, suspect a shorted high-voltage component.
- Visual inspection: Look for burn marks around the high-voltage transformer, capacitor, diode, and magnetron.
- Professional diagnosis: Due to the danger of high voltage, have a qualified technician test and replace the defective high-voltage component.
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Repair Difficulty
Professional Required
5/5
Required Part
High-Voltage Diode
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