Breville
Power Output Calibration / Sensor Inaccuracy
Microwave overcooks or undercooks food compared to the set time and power level.
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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
Aging magnetron reducing output, Incorrect power level selection, Faulty humidity or temperature sensor, Control board calibration drift
How to Fix / Troubleshooting
Safety: Use caution when testing with hot water or food.
User-level steps:
- 1. Verify power level: Confirm that the power level is set to HIGH (100%) when expected.
- 2. Perform a water test: Heat 1 cup (250 ml) of room-temperature water on HIGH for 2 minutes. It should be very hot or near boiling. If barely warm, output is low.
- 3. Adjust cooking times: If output seems consistently low, increase cooking times by 10–20% as a temporary workaround.
- 4. Avoid sensor modes: If auto/sensor modes are inaccurate, use manual time and power settings instead.
Significant deviation from expected heating performance may indicate a weakening magnetron or faulty sensor. For accurate diagnosis and repair, contact a technician.
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Repair Difficulty
Hard
4/5
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