Check for carbon buildup on the pilot burner or ensure the pilot flame is fully engulfing the top 1/2 to 2/3 of the thermopile tip

Built for high-demand contractor environments

Heavy-Duty Construction: High-grade materials resist oxidation and warping in high-temperature combustion chambers

always verify your system's Delta P against the 5/32" orifice rating

Key Benefits Internal Safety: Lever-acting design provides high-leverage valve seating for positive dead-end lock-up

White-Rodgers 1609-90 Control Els PW 17895 Check for carbon buildup onThe White Rodgers 1609 90 is a heavy duty hydraulic action refrigeration temperature control designed specifically for demanding commercial and industrial applications. This mechanical control is built for zoning systems where multiple controllers manage a common compressor via separate solenoid refrigerant valves in each zone. Engineered with a two circuit hook up (SPST), the 1609 90 provides a close on rise switch action to ensure positive system