E15
AEG
Thermal Cut-Out (TCO) or Safety Thermostat Trip
Microwave shows E15 and stops mid-cycle, often after a loud click.
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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
Overheating due to blocked vents, Failed cooling fan, Weak or faulty thermal cut-out, Excessive internal temperature from prolonged use
How to Fix / Troubleshooting
Safety warning: Unplug the microwave and allow it to cool completely before inspection.
- Step 1 – Ventilation check: Ensure the microwave has the required clearance and that cabinet cut-outs for built-in AEG models are not blocked.
- Step 2 – Clean vents: Remove dust and grease from intake and exhaust vents using a vacuum and soft brush.
- Step 3 – Locate TCOs: Thermal cut-outs are usually clipped to the magnetron, cavity, or chassis. Inspect for signs of overheating.
- Step 4 – Test continuity: With a multimeter, check each TCO for continuity. Replace any that are open-circuit and not self-resetting.
- Step 5 – Investigate root cause: If a TCO has failed, verify that the cooling fan operates correctly and that airflow is not obstructed to prevent repeat trips.
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Repair Difficulty
Hard
4/5
Required Part
Thermal Cut-Out (TCO)
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