HIGH OIL TEMP
Guardian
Engine Overheating – Air-Cooled System
Air-cooled Guardian generator shuts down with HIGH OIL TEMP or HIGH ENGINE TEMP alarm after running under load.
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Blocked cooling air intake or discharge, Heavy dirt or grass on engine cooling fins, Failed engine cooling fan, Operating in confined or poorly ventilated area
How to Fix / Troubleshooting
Safety first: Turn the controller to OFF, open the main breaker, and allow the unit to cool. Do not run with covers removed except for brief testing.
- Inspect air inlets and outlets: Ensure the Guardian enclosure louvers and intake screens are not blocked by snow, leaves, or debris. Clear any obstructions.
- Clean engine cooling fins: Remove the top cover per the service manual. Use compressed air to blow dirt and grass from the cylinder head and stator cooling fins. Avoid bending fins.
- Check cooling fan: Verify the flywheel fan or auxiliary cooling fan is intact and securely attached. Replace if blades are broken or missing.
- Verify clearance: Ensure the generator has the minimum clearance from walls and vegetation specified by Guardian to allow proper airflow.
- Reset and test: After cleaning, reset the alarm and run the unit under moderate load. If HIGH OIL TEMP returns, have a technician inspect for internal engine issues.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Engine Cooling Fan
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements