Generator shuts down and displays E05; controller may indicate high engine temperature.

Safety first: Turn the generator OFF and allow it to cool for at least 30–45 minutes. Do not open panels while the engine is hot or running.

• Inspect ventilation: Check all intake and exhaust louvers on the Ryobi enclosure. Remove leaves, grass, snow, or debris. Ensure the generator has the clearance specified in the installation manual and is not boxed in by shrubs or structures.
• Check oil level: Verify engine oil is at the proper level using the dipstick. Low oil can cause overheating. Top up with the recommended oil if needed.
• Inspect cooling fan and shrouds: Remove the service panel and visually inspect the flywheel fan and plastic shrouds. Look for broken blades, missing shroud pieces, or rodent nests blocking airflow. Clean out debris carefully.
• Check temperature sensor wiring: Locate the cylinder head or block temperature sensor. Ensure its connector is tight and wiring is intact. Corroded or broken wiring can cause false overheat readings.
• Reset and test: After cleaning and inspection, reconnect the battery if disconnected, clear E05, and run the generator with light load. If it overheats again, stop use and have a technician check coolant (if liquid‑cooled), verify actual head temperature, and test the temperature sensor.