York S1-024-27634-001 Pressure Switch

The York S1-024-27634-001 Pressure Switch is a critical safety component designed for precise differential pressure sensing in York, Luxaire, and Coleman gas furnaces. This SPNO (Single Pole Normally Open) switch is factory-calibrated to a .65" WC setpoint, closing on a fall in pressure to ensure the induced draft motor is maintaining adequate venting before the ignition sequence initiates. Engineered for high-cycle reliability in residential heating systems, this 024-27634-001 pressure switch replaces outdated or failing vacuum switches that cause frequent furnace lockout codes. Proper installation requires verifying the inches of water column rating against the OEM specifications listed on the furnace data plate. This component utilizes standard 3/16" or 1/4" flexible tubing connections and 1/4" male spade terminals for seamless integration into the existing 24V control circuit, providing reliable combustion air proving and preventing operation under restricted flue conditions.

• OEM Precision: Specifically calibrated to .65" WC for exact compatibility with York furnace pressure switch requirements.
• Enhanced Safety: Effectively monitors venting pressure to prevent hazardous operation during flue blockages or inducer failure.
• Rugged Construction: Designed to withstand the high-temperature environment of an HVAC inducer housing.
• Standardized Fit: Direct drop-in replacement for York S1-024-27634-000 and 02427634001 models.

• What causes a .65" WC pressure switch to trip? Typically, this occurs due to a clogged condensate drain, restricted vent piping, or a failing inducer motor that cannot maintain the required vacuum.
• Can I use a switch with a different WC rating? No. Using a switch with an incorrect WC setpoint can lead to dangerous combustion conditions or frequent system short-cycling.
• How do I test the S1-024-27634-001? Use a manometer to verify the actual pressure produced by the inducer and a multimeter to check for continuity across the terminals when the setpoint is reached.

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.