Lochinvar & A.O. Smith 100274785 Valve 30067439-890 A faulty switch typically triggers

A faulty switch typically triggers a specific diagnostic flash code on the furnace control board (often 2 or 3 flashes)

For dedicated bi-directional requirements

Technicians can fine-tune system performance using the adjustable differential

ensuring a reliable contact point for professional wiring

Lochinvar & A.O. Smith 100274785 Valve 30067439-890 A faulty switch typically triggersThe Lochinvar & A. O. Smith 100274785 Pressure Relief Valve is a critical OEM replacement part engineered for high capacity commercial boilers and water heating systems. Featuring a robust 1 1 2" x 2" connection size and a factory set 50 PSI pressure rating, this valve provides essential overpressure protection for heavy duty hydronic applications. With a massive relief capacity of 4,237,000 BTU hr, it is designed to meet strict ASME safety standards,