this relay handles steady-state currents up to 10 Amps

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

Internal blockages from sediment or scale can occur within the 1/4" tubing over time

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

Lochinvar & A.O. Smith 100074280 Limit Switch 318518-761 this relay handles steady-state currentsThe 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