What is thermal overload protection in an HVAC system?

Thermal overload protection is a crucial safety feature in HVAC systems designed to prevent overheating of electrical components and machinery. This safety mechanism monitors the temperature of the electrical windings in motors and other components. When the temperature exceeds a predetermined threshold, the thermal overload protection will trip (or open the circuit), cutting off power to the device. This action helps to avoid potential damage to the equipment, reduces the risk of electrical fires, and extends the lifespan of the components by preventing excessive heat buildup. Consequently, the system ensures safe and reliable operation by safeguarding against conditions that could lead to failure or hazardous situations.