Generator Overheating

Runs hot then shuts down, especially under load. Usually airflow, oil level/quality, or load mismatch. Sometimes a failing AVR working too hard. Here’s the diagnostic ladder.

Generator Overheating and Shutting Off: The Cooling Airflow Fix

Keith A S. / June 4, 2026

A generator that runs for 5-30 minutes then shuts off is almost always overheating from restricted cooling airflow. The fin-cleaning fix is free and takes 30 minutes.