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Shawn RyanSep 12, 2025
How to fix an Eaton Power Supply with the Overtemperature LED on and beeping every 3 seconds?
- CcarterevanSep 12, 2025
If the UPS Overtemperature LED is on and it beeps every 3 seconds, the UPS internal temperature is too high or a fan has failed. If the UPS transferred to Bypass mode, it will return to normal operation when the temperature drops 5°C below the warning level. If the condition persists, shut down the UPS. Clear vents and remove any heat sources, ensure airflow is not restricted, allow the UPS to cool, and then restart it. If the condition continues to persist, contact your service representative.
 








