Controller displays “High Engine Temp” or “Overcrank – High Temp” and shuts down the generator during or shortly after running.

Safety first: Turn generator OFF, open the main AC breaker, and allow the unit to cool completely. Do not open radiator caps on hot engines.

Steps:

• Check airflow: Inspect all intake and exhaust louvers on the Eaton enclosure. Remove leaves, snow, debris, or obstructions within at least 3 feet of all sides.
• Inspect fan and shrouds: For air-cooled units, verify the engine cooling fan spins freely and that shrouds are intact. Replace broken fan blades or damaged shrouds.
• Check coolant (liquid-cooled): When cool, check coolant level in the radiator or overflow tank. Top off with the specified coolant mix if low and inspect for leaks at hoses, clamps, and water pump.
• Inspect temperature sensor: Locate the engine temperature sender on the cylinder head or coolant passage. Check for loose connectors, corrosion, or damaged wiring. Clean and reseat.
• Clear and test: Clear the alarm and run the generator under light load while monitoring temperature. If overheating recurs quickly, shut down and have a technician check thermostat operation and internal cooling passages.