York S1-024-34612-000 Pressure Switch

The York S1-024-34612-000 is an OEM 1.20/.40 N/O dual pressure switch engineered for precise draft verification in two-stage gas furnace applications. This HVAC differential pressure control monitors the pneumatic pressure generated by the inducer motor to ensure the combustion circuit only closes under safe venting conditions. Featuring factory-calibrated setpoints of 1.20" WC and 0.40" WC, this York furnace replacement part is essential for managing airflow requirements across both low and high-fire heating cycles. The HVAC air pressure sensor utilizes high-sensitivity diaphragms and normally open (N/O) silver-alloy contacts to provide reliable continuity and integrated safety logic. Designed as a direct-fit component for York, Coleman, and Luxaire systems, it ensures the control board receives accurate signals regarding flue gas velocity and intake vacuum. This dual-switch assembly is critical for preventing operation during venting obstructions or inducer mechanical failure, maintaining the specific static pressure thresholds required for efficient heat exchanger performance.

• Dual-stage calibration with 1.20" and 0.40" water column setpoints for precise safety monitoring.
• Normally Open (N/O) contact configuration prevents ignition during inducer or venting failures.
• Genuine OEM replacement ensures exact terminal lead-spacing and mounting footprint for fast installation.
• Durable diaphragm construction engineered to withstand high-cycle residential and commercial heating demands.

Why is my York furnace displaying a pressure switch stuck open code?
This typically occurs when the inducer motor fails to reach the required 0.40" or 1.20" WC threshold, which can be caused by a cracked collector box, blocked vent pipe, or a restricted condensate drain in high-efficiency units.

Can I use a single-stage switch to replace this dual-stage component?
No. This switch manages two distinct stages of operation; substituting it with a single-stage switch will prevent the furnace from modulating correctly and will likely trigger a control board lockout.

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.