preventing mechanical binding and internal gear stress

Key Benefits Adjustable Set Point: Field-adjustable from 135°F to 175°F to match a wide variety of equipment specifications

The equal percentage (%Vport) characterization ensures stable throttling control

ensuring the heat exchanger is protected against overheating conditions caused by airflow obstructions or blower failure

High-Capacity Throughput: Optimized for large-scale systems with a 21 Cv rating for maximum gas flow

Lochinvar & A.O. Smith 100074280 Limit Switch 318518-761 preventing mechanical binding and internalThe Lochinvar & A. O. Smith 100074280 High Limit Switch is a critical safety component engineered to provide thermal protection in high efficiency heating systems. Designed as a genuine OEM replacement part, this switch monitors the internal temperature of the heat exchanger or burner door to prevent unsafe operating conditions. If temperatures exceed the factory defined safety threshold, the 100074280 triggers an immediate system lockout to mitigate