York S1-024-25006-706 Pressure Switch

The York S1-024-25006-706 Pressure Switch is a critical OEM safety component calibrated for a fixed set point of .20" WC. Designed specifically for York, Luxaire, and Coleman gas furnaces, this air pressure sensing switch monitors the vacuum created by the draft inducer motor to ensure the venting system is clear of obstructions before the ignition sequence begins. High-performance HVAC technicians rely on this dual SPDT contact configuration to provide precise millivolt signal feedback to the integrated control board, preventing hazardous operation in the event of flue blockages or inducer assembly failure.

Replacing a faulty 0.20-inch water column switch is essential for resolving common furnace lockout codes, such as the frequent 4-flash error on York systems. This genuine York replacement part features a high-grade diaphragm and resilient casing to withstand the thermal stress of residential and light-commercial applications. Proper installation requires checking the silicone tubing for moisture or cracks, as these variables can cause intermittent signal drops during the combustion process and lead to inefficient performance or nuisance tripping.

• OEM Compatibility: Precision-engineered for exact fitment in York, Coleman, and Luxaire gas furnaces.
• Precise Calibration: Fixed .20" WC set point ensures optimal safety and system timing.
• Enhanced Reliability: Heavy-duty SPDT contacts maintain high-integrity electrical continuity for communication with the control module.
• System Safety: Acts as a primary fail-safe against cracked heat exchangers and restricted exhaust venting.

• What causes a .20" WC pressure switch to stay open? Most often, this is caused by a blocked flue, water in the pressure tubing, or a weakening draft inducer motor that cannot pull the required negative pressure.
• Can I bypass this switch for testing? Bypassing a safety switch is never recommended during normal operation; use a manometer to verify actual draft pressure meets the .20" WC threshold before condemning the part.
• How do I identify a failing switch? Signs include the inducer running without ignition, the igniter failing to glow, or the control board displaying a "pressure switch stuck open" fault code.

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.