Overheating electrical components often emit a higher-pitched buzz than usual. Immediate Steps to Take When it Runs Hot
Running the unit at 100% capacity for longer than its rated duration will inevitably lead to a "hot" status. Critical Signs of Thermal Distress dphn 142 hot
Look for "bluing" on metal surfaces or charred plastic housing. dphn 142 hot
Immediately de-energize the system to stop the heat generation. dphn 142 hot