Russell Hobbs
No Heat – Magnetron / High Voltage Circuit Failure
Microwave runs but does not heat food at all (no error code displayed)
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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,Blown high-voltage diode,Open high-voltage capacitor,Open high-voltage transformer primary or secondary winding
How to Fix / Troubleshooting
Critical safety warning: The high-voltage section is dangerous. Only qualified technicians should work on magnetron, transformer, capacitor, and HV diode.
- 1. Confirm no heating: Place a microwave-safe cup of water inside and run on full power for 1–2 minutes. If the water remains cold and the light, fan, and turntable operate, the issue is in the heating circuit.
- 2. Basic user checks: Ensure you are not in a low-power or defrost mode. Try a different power level and time setting.
- 3. Do not continue to operate: Running the microwave without heating can further damage components.
- 4. Professional repair: A technician will test the magnetron, HV transformer, capacitor, and diode, and replace the failed part with a Russell Hobbs-compatible component.
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Repair Difficulty
Professional Required
5/5
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