H98
GE
High-Voltage Circuit Protection / Magnetron Failure
Microwave shows H98 and does not heat; may stop shortly after starting.
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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, Failed inverter board, Shorted high-voltage diode or capacitor, Faulty high-voltage transformer (model-dependent)
How to Fix / Troubleshooting
Extreme danger: High-voltage components can store lethal charges. Do not attempt to test or replace the magnetron, capacitor, diode, or inverter unless you are properly trained.
- Reset: Unplug the microwave for 5–10 minutes, then try a short cook cycle. If H98 reappears, discontinue use.
- Listen and observe: If you hear unusual buzzing or smell burning when it attempts to start, immediately stop and unplug.
- Professional diagnosis: A technician will test the magnetron, inverter board, high-voltage diode, and capacitor. Replacement of the magnetron or inverter is common for H98.
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Repair Difficulty
Professional Required
5/5
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