York S1-024-35266-000 Pressure Switch

The York S1-024-35266-000 Pressure Switch is a critical OEM safety component engineered for precise drafting and combustion air monitoring in high-efficiency York furnace systems. This Single Pole Normally Open (SPNO) switch is calibrated with specialized .45/.85" W.C. set points, operating on a close-on-fall logic to ensure the inducer motor maintains proper static pressure before ignition sequences proceed. As a genuine Johnson Controls York replacement part, this differential air pressure switch prevents hazardous operation by interlocking the gas valve circuit with verified venting performance. Designed for direct mechanical compatibility with existing furnace draft inducer assemblies, it eliminates the calibration drift often found in universal aftermarket alternatives. Whether you are troubleshooting a York pressure switch stuck open fault or performing a routine HVAC inducer motor repair, this OEM S1-024-35266-000 provides the exact electrical switching sensitivity required to meet factory sequences and local mechanical codes.

Technical Specifications & Benefits:

• OEM Compatibility: Exact drop-in York replacement part for S1-024-35266-000, ensuring correct terminal alignment and mounting footprints.
• Precise Actuation: Calibrated .45/.85" W.C. range provides high-accuracy response to static pressure fluctuations within the vent assembly.
• SPNO Circuitry: Designed for close-on-fall operation, a standard safety requirement for monitoring vacuum levels in gas-fired HVAC equipment.
• Durable Diaphragm: High-grade internal construction resists cycle fatigue and environmental stressors common in residential heating systems.
• Simplified Diagnostics: Standardized spade terminals allow for rapid multimeter testing and integration with 24V control boards.

Common Questions:

How do I verify if the S1-024-35266-000 is the correct switch for my inducer?
Contractors should verify the pressure switch set points stamped on the factory label. This unit is rated for .45/.85" W.C. and is specifically a close-on-fall type. Check your York furnace model number against the manufacturer parts list to ensure match.

Can I use a universal pressure switch instead of this York OEM part?
While universal switches exist, furnace pressure switches are safety-critical. Using a part with incorrect water column ratings can lead to delayed ignition or failure to sense a blocked flue, which is why genuine York parts are recommended for maintaining system integrity.

What causes a close-on-fall pressure switch to fail?
Common issues include diaphragm fatigue, moisture in the sensing tubes, or pitted electrical contacts. If your York furnace throws a limit or pressure switch lockout code, inspect the draft inducer and flue for obstructions before replacing the switch.

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.