This HVAC replacement part is engineered to withstand the thermal cycling typical of high-efficiency furnaces

What are the symptoms of a failing HSI

install the unit at the tank discharge

including air compressors

Flexible Control Options: The SPDT switch configuration allows for simple conversion between low-pressure cut-out and high-pressure cut-in applications

Lochinvar & A.O. Smith 100112435 Pilot Assembly 323269-701 This HVAC replacement part isThe Lochinvar & A. O. Smith 100112435 Pilot Assembly is a critical OEM ignition component engineered for high performance residential and commercial gas water heaters. As a veteran grade replacement pilot burner, this assembly ensures reliable ignition sequences and stable flame sensing, preventing nuisance lockouts and equipment downtime. This comprehensive kit typically includes the pilot tube, thermocouple or flame sensor, and precision calibrated