SMEG
Reduced Microwave Output
Microwave interior light, fan, and turntable operate, but food remains cold or only slightly warm.
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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
Weak magnetron, Failing inverter module, Low mains voltage, Faulty power level control on PCB
How to Fix / Troubleshooting
Safety: This symptom usually does not present immediate danger, but internal HV parts may be failing. Do not attempt internal repairs.
Performance test:
- Place 1 cup (250 ml) of room-temperature water in a microwave-safe container.
- Heat on full power for 1–2 minutes and measure the temperature increase. It should rise significantly (typically 20–30°C depending on power rating).
- If the temperature barely changes, output is low.
User actions:
- Ensure the microwave is on a dedicated circuit with proper voltage.
- Avoid using long extension cords.
If low output persists:
- Internal components such as the magnetron or inverter likely need replacement by a technician.
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Repair Difficulty
Professional Required
5/5
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