Unlike legacy thermostatic expansion valves

Key Benefits Precision Thermal Calibration: Fixed 325°F (163°C) trip point ensures timely circuit interruption to protect the heat exchanger

this assembly provides the OEM compatibility and industrial-grade reliability necessary to maintain peak boiler combustion efficiency and system safety

you recognize that a failing blower often triggers BE-1 fault codes or "No Blower Feedback" errors

It requires a Ranco LDK Series solenoid coil

Lochinvar & A.O. Smith 100093633 Switch 323269-701 Unlike legacy thermostatic expansion valvesThe Lochinvar & A. O. Smith 100093633 Pressure Switch is a critical OEM safety component engineered for high efficiency water heating systems, including Polaris water heaters. This 0. 85" WC pressure switch operates as a normally open contact that closes when the inducer fan generates sufficient static pressure, ensuring the combustion cycle only proceeds under safe venting conditions. As a direct Polaris IS22085 replacement, this kit provides a