York S1-024-35264-000 Pressure Switch

The York S1-024-35264-000 Pressure Switch is a critical safety component engineered for York, Coleman, and Luxaire gas furnaces, specifically the GY9S and L9S upflow natural gas condensing furnace models. As a Single Pole Normally Open (SPNO) switch, it is calibrated to close on fall at a -1.60" WC pressure rating. This OEM furnace pressure switch monitors the vacuum created by the inducer motor to ensure proper venting of combustion gases. If the inducer fails to maintain the specified negative pressure, the York S1-02435264000 breaks the circuit, preventing burner ignition and ensuring safe equipment operation. Designed for high-reliability in residential HVAC induction systems, this part features a dual hose port and two-terminal terminal configuration for seamless York replacement part integration. Utilizing a genuine York pressure switch maintains the original engineering specifications and factory performance levels required for high-efficiency condensing units.

• Factory Calibrated: Precisely set to 1.6" WC to ensure the sequence of operation meets manufacturer safety standards.
• OEM Compatibility: Exact replacement for Source1 and York part number S1-024-35264-000, fitting FC9S and FL9S models.
• System Protection: Prevents furnace operation during venting failures or restricted secondary heat exchangers.
• NEMA Rated Construction: Durable diaphragm materials designed to withstand the corrosive environment of condensing furnace exhaust.

What does 'Close on Fall' mean for this York part?
In this context, it refers to the switch contacts closing when the negative pressure (vacuum) reaches the 1.60" WC set point, allowing the ignition sequence to proceed.

Can I use a universal pressure switch instead of the S1-024-35264-000?
Standardizing on the genuine York S1-02435264000 is recommended because universal switches often lack the specific 1.6" WC calibration required for York condensing furnaces, which can lead to nuisance tripping or unsafe operation.

Why is my furnace giving a pressure switch lockout code?
If the York pressure switch fails to close, check for a failing inducer motor, blocked vent pipes, or a clogged condensate drain before replacing the S1-024-35264-000.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.