H98
Fisher & Paykel
High-Voltage System Protection Fault
Microwave displays H98 and will 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, Shorted high-voltage diode (non-inverter models), Failed inverter module, Open thermal cut-out on magnetron or cavity
How to Fix / Troubleshooting
Critical safety warning: H98 is a high-voltage protection error. Do not attempt to service the high-voltage circuit unless you are qualified.
- Power cycle: Disconnect power for 10 minutes, then reconnect and test. If H98 returns, a component is likely shorted or open.
- Check thermal cut-outs: With power disconnected, locate thermal cut-outs on the magnetron and cavity. Test for continuity. Replace any open cut-out with the correct Fisher & Paykel part.
- Visual inspection: Look for burn marks around the magnetron, high-voltage diode, and wiring. Any visible damage indicates the need for component replacement.
- Professional repair: Testing the magnetron, diode, and inverter requires specialized procedures. Contact an authorized service center to replace the faulty high-voltage components safely.
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Repair Difficulty
Professional Required
5/5
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