Microwave displays 'H97' and does not heat; fan and light may still operate.

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

Failed inverter board, Shorted magnetron, Loose high-voltage connections, Faulty high-voltage transformer (non-inverter variants)

Extreme danger: High-voltage components can store lethal charges. Do not attempt to service the inverter, transformer, or magnetron yourself.

Reset: Unplug the microwave for 10–15 minutes and reconnect. If H97 returns, internal HV components are likely faulty.
Check ventilation: Ensure vents are clear and filters are clean to prevent overheating.
Professional repair: A technician should test the inverter board, magnetron, high-voltage transformer (if present), and associated wiring. Typically, the inverter or magnetron will be replaced.

Professional Required 5/5

Inverter Board / Magnetron

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