York S1-024-35324-000 Pressure Switch

The York S1-024-35324-000 Pressure Switch is a critical safety component engineered for two-stage gas furnaces and air handlers. This dual air pressure switch features a precision-calibrated 0.60/0.20 inch WC setpoint, operating on a Close on Fall logic to ensure the inducer motor maintains the necessary vacuum for safe combustion and venting. As an SPNO (Single Pole Normally Open) device, it monitors the differential pressure across the heat exchanger, preventing ignition if airflow is insufficient or if a flue blockage is detected.

Designed for seamless integration with York, Coleman, and Luxaire equipment, this genuine OEM HVAC replacement part (also identified by cross-reference numbers 160209 and 9371-VO-HD-0056) utilizes high-grade diaphragms to resist operational fatigue. For technicians, the clear 0.6/.2 Amps electrical rating and standard terminal configurations allow for rapid diagnostic testing and installation. Ensuring the correct furnace pressure switch calibration is essential for maintaining furnace efficiency and preventing nuisance trips or unsafe "no-heat" calls in residential and light commercial systems.

• Precision Setpoints: Engineered with 0.60" and 0.20" WC thresholds specifically for 2-stage heating cycles.
• Enhanced System Safety: Employs close on fall logic to verify proper draft before allowing the gas valve to energize.
• Direct OEM Compatibility: Verified fit for York S1-024-35324-000, ensuring zero-modification installs in supported air handlers.
• Durable Construction: Built to withstand the high-temperature environments of inducer motor housings without calibration drift.

What does 'Close on Fall' mean for this York switch?
In this context, the contacts are designed to close as the negative pressure (vacuum) reaches the specific setpoint, completing the safety circuit once the inducer fan generates sufficient suction.

Can I use this switch for a single-stage furnace?
This is a dual-stage pressure switch. It is designed for 2-stage equipment that requires monitoring of both high and low-fire pressure states. Always match the WC ratings on your original part's label.

Is this compatible with Honeywell 9371 series switches?
Yes, this unit is the authorized OEM replacement for the Honeywell 9371-VO-HD-0056 often found in Source 1 equipment lines.

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.