OK
No Heat / High Voltage System Failure
Microwave runs but does not heat food; turntable and light work normally
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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 module
How to Fix / Troubleshooting
Critical safety: The high-voltage section is dangerous. If you are not trained, do not attempt internal repairs.
- 1. Confirm no heat: Heat a cup of water for 1–2 minutes. If it remains cold, heating is not working.
- 2. Basic external checks: Ensure you are using microwave-safe containers and that the door is fully closed.
- 3. Internal diagnosis: Requires testing the magnetron, diode, capacitor, and transformer/inverter with proper procedures and tools.
- 4. Recommended action: Contact a qualified technician to test and replace the magnetron and associated high-voltage components as needed.
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Repair Difficulty
Professional Required
5/5
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