Microwave displays H98 and will not heat; may stop shortly after starting.

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.

Possible Causes

Defective inverter board, Shorted magnetron drawing excessive current, Faulty high-voltage wiring, Internal inverter protection trip

Critical Safety Warning: H98 is a high-voltage inverter error. Do not open or service the inverter or magnetron unless you are trained.

User action: Unplug the microwave and discontinue use.
Visual check only: If you remove the outer cover (with power disconnected), do not touch the inverter or magnetron. Look for obvious burn marks, then reassemble.
Professional repair: A technician will diagnose whether the inverter or magnetron (or both) must be replaced.

Due to the danger involved, H98 repairs are not DIY-friendly.

Professional Required 5/5

Inverter Board

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