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The York S1-7975-3771 is a professional-grade 24V SPDT Fan Relay designed for high-cycle reliability in residential and light commercial air handlers
technicians ensure optimal performance and long-term system stability
The Ranco pressure control is housed in a rugged NEMA 1 enclosure and utilizes a laser-welded bellows for high-cycle reliability
OEM Compatibility: Specifically designed as a direct replacement for Lennox 45H8301
Modine 3H0337490008 Conversion Kit R-410A The York S1-7975-3771 is aAs a field technician, you understand that a precise fuel transition is critical for maintaining combustion stability and system safety. The Modine 3H0337490008 Conversion Kit is the essential OEM replacement part designed to adapt your natural gas (NAT) unit heater for liquid propane (LP) operation. This specific kit is the direct engineering successor to the Modine 3H33749 8, ensuring a drop in fit without the need for manifold modifications. When