Lochinvar & A.O. Smith 100208556 Sensor Kit 318423-701 This heavy-duty thermal expansion valve

This heavy-duty thermal expansion valve power element

The 370V oval capacitor configuration ensures a drop-in fit for compact York

The Sporlan 168072 QC-1 is designed for conventional port Q series valves

High-pressure LP systems require a different orifice sizing and valve calibration

the D9817305 is the manufacturer-specified direct replacement for the D9817302

Lochinvar & A.O. Smith 100208556 Sensor Kit 318423-701 This heavy-duty thermal expansion valveThe Lochinvar & A. O. Smith 100208556 Limit Flue Sensor Kit is a critical OEM replacement component engineered for precise monitoring of exhaust temperatures in high efficiency heating systems. This flue limit rated sensor acts as a primary safety mechanism, detecting excessive heat within the venting system to prevent heat exchanger damage and ensure professional grade operational safety. Designed to replace legacy part numbers 100170535 and