York S1-024-34684-000 Pressure Switch

The York S1-024-34684-000 Pressure Switch is a critical OEM safety component specifically engineered for York 2-stage furnaces. Designed as a dual-stage differential switch, this part monitors the furnace draft inducer motor to ensure combustion gasses are properly vented before allowing the gas valve to energize. Technical specifications include a high-stage deactivation rating of 1.4 in-WC and a low-stage deactivation at 0.4 in-WC, ensuring precise HVAC pressure control across varying firing rates. Compatible with downflow and horizontal models like the FL9T series, this switch utilizes a normally open (NO) configuration that closes only when the specific pressure setpoints are met, preventing unsafe operation due to blocked flues or motor failure. As a legitimate York replacement part, it guarantees correct electrical termination and mounting alignment, which are vital for maintaining system efficiency and avoiding nuisance trips in high-efficiency gas furnace switches. This industrial-grade air pressure switch is built to withstand the rigorous cycling of modern 2-stage heating systems.

• Dual-Stage Precision: Calibrated for 0.9/1.4 and 0/0.4 in-WC setpoints to provide accurate 2-stage furnace cycling.
• OEM Compatibility: Exact York S1-024-34684-000 replacement ensures zero-mod installation for HVAC contractors.
• Enhanced Safety: Acts as a fail-safe against venting obstructions, protecting the heat exchanger and occupants.
• Optimized Draft Monitoring: Specifically designed to interface with the furnace draft inducer for reliable signal feedback.

Is this switch compatible with single-stage York furnaces?
No, the S1-024-34684-000 is a dual-stage switch. Using a 2-stage switch in a single-stage system will cause sequencing errors; always verify the part number on the existing switch before replacement.

What causes a pressure switch stuck open error on this model?
Usually, this indicates a restricted vent pipe, a failing inducer motor, or moisture in the pressure sensing tubing. If the inducer is running at full speed and the switch does not close, check for blockages in the heat exchanger.

Can I adjust the pressure setpoints on this switch?
The S1-024-34684-000 is factory-calibrated and sealed. Attempting to adjust the internal diaphragm can lead to unsafe combustion conditions and equipment failure.

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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.