York Parts S1-02435311000 Gas Furnace Air Pressure Switch

Gas Furnace Air Pressure Switch is a critical safety component that protects your heating system by monitoring draft and venting performance. The York Parts S1-02435311000 Gas Furnace Air Pressure Switch delivers reliable, ready-to-install operation with a calibrated Presair -0.65 setting for compatible furnaces. Built to withstand typical HVAC environments, this switch helps ensure safe ignition, proper flame stabilization, and automatic shut-down when airflow falls outside safe ranges.

Whether you’re replacing a worn valve or upgrading to a dependable safety device, this switch provides peace of mind. The compact, durable design fits standard furnace wiring and replaces common York parts without extensive modification, making it a smart choice for homeowners and professional technicians alike.

• Calibrated Presair -0.65 for consistent pressure response and reliable furnace operation.
• Model S1-02435311000 compatible with York Parts inventories and many York-compatible systems.
• Durable construction with corrosion-resistant materials for long service life.
• Easy installation using standard electrical connections and clearly labeled terminals.
• Enhanced safety with dependable shutdown if airflow or venting conditions are unsafe.