What to do if Xantrex Freedom SW 815-3024 shows FET1 Over Temperature?
- LLauren BuckAug 6, 2025
If the Xantrex Inverter displays a FET1 Over Temperature error, several factors could be the cause. First, ensure adequate ventilation around the inverter and allow it to cool down before restarting. Remove excessive inverter loads if you are operating too large of a load for too long. Check if the inverter cooling fan is working—it should be on if the temperature is above 104 °F (40 °C). Also, ensure that the inverter airflow intake is not blocked by increasing clearance around the inverter and unclogging the airflow intake vents.