Safety: Overheating can damage electronics. Allow the charger to cool before further use.

Check ventilation: Ensure there is clear space around the Enphase charger per the installation manual (typically several inches on all sides). Remove any stored items blocking airflow.
Ambient temperature: If installed in a hot garage or in direct sun, measure ambient temperature. If above the rated limit, consider shading, ventilation, or relocating the unit.
Inspect for dust buildup: With power OFF at the breaker, visually inspect vents and grills. Gently vacuum dust from external vents. Do not open sealed sections or use compressed air directly into the unit.
Listen for fan operation: During charging, you should hear the internal fan (if your model has one). If E106 occurs and the fan never runs, the fan or its driver may have failed.
If E106 recurs frequently: Internal temperature sensors or the power module may be failing. Contact an Enphase service provider to test sensors and replace the cooling fan or control/power module.

Charger displays E106; app may show 'Overtemperature – charging disabled'.

Possible Causes