Galanz
No Heat – High-Voltage System Failure
Microwave runs (light and turntable on, fan running) but food does not heat at all.
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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 magnetron, Open high-voltage diode, Open high-voltage capacitor, Failed high-voltage transformer or inverter board
How to Fix / Troubleshooting
Extreme danger: The high-voltage section can store and generate lethal voltages. Do not attempt to test or replace HV components unless you are trained and can safely discharge the capacitor.
Safe user checks:
- 1. Verify settings: Ensure you are not on a low power or defrost setting. Test with 1–2 minutes on full power and a cup of water.
- 2. Listen for HV hum: During operation, a healthy transformer or inverter usually produces a low hum. Total silence (with fan and turntable running) can indicate HV failure.
- 3. Professional service: A technician will test the magnetron, HV diode, capacitor, and transformer/inverter and replace the failed component(s).
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Repair Difficulty
Professional Required
5/5
Required Part
Magnetron or High-Voltage Transformer
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