H98
Panasonic Inverter or magnetron failure (microwave section)

Combination Panasonic oven (microwave + convection) shows H98 and microwave function does not work, though oven heating may still operate.

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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

Failed inverter power module, Defective magnetron, Open thermal cut-out on magnetron, Loose high-voltage connections

How to Fix / Troubleshooting

Extreme danger: The microwave section contains lethal high voltage even when unplugged. Do not attempt internal microwave repairs unless you are a trained technician with proper equipment.

  • 1. Basic checks only: Confirm that the convection/oven functions still work. If only the microwave function fails with H98, the issue is in the high-voltage microwave circuit.
  • 2. Power reset: Turn off the appliance at the breaker for 10 minutes and retry. If H98 returns, internal service is required.
  • 3. Do not open microwave compartment: High-voltage capacitors can retain charge and the waveguide must remain sealed to prevent radiation leakage.
  • 4. Contact service: Arrange service with a Panasonic-authorized technician to test the inverter, magnetron, and associated thermal cut-outs and wiring.

Because of radiation and shock hazards, component-level repair of the microwave section is not recommended for DIY.

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Repair Difficulty

Professional Required 5/5

Required Part

Inverter Power Module
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