The York S1-9951-0931 is a precision-engineered LP Gas Orifice designed for specific burner manifold applications in York

this component is critical for maintaining precise flow control and downstream stability in residential and light commercial natural gas or propane applications

which can compromise service speed and sanitation standards

With a standard 5/16 inch stroke

Lennox 38M07 Limit Switch The York S1-9951-0931 is aThe Lennox 38M07 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC systems. This genuine OEM Lennox part (MPN: 38M07) features a 3 inch insert length and operates as a normally closed switch, ensuring the circuit remains engaged during standard operation. Engineered to prevent heat exchanger damage and unsafe operating conditions, this 135 165F AUTO limit switch automatically