F19
JennAir
Current Sense or Overcurrent Error
Microwave shows F19 and may not heat or may shut down when starting a high-power cook cycle.
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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 magnetron, Shorted high-voltage diode, Failing high-voltage transformer, Control board current sense circuit fault
How to Fix / Troubleshooting
Safety First: High-voltage microwave repairs are hazardous. Unplug the unit and do not attempt to test high-voltage components unless qualified.
- Basic inspection: Smell for burning odors and look through vents for obvious charring. If present, discontinue use.
- Professional service: A technician will test the magnetron, HV diode, HV capacitor, and transformer, and verify the control board’s current sensing circuit.
- Component replacement: Replace any shorted high-voltage components and, if necessary, the electronic control board.
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Repair Difficulty
Professional Required
5/5
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