York S1-025-21710-002 Pressure Control

The York S1-025-21710-002 Pressure Control is a critical OEM safety component designed for precise monitoring of pressure differentials in HVAC systems. Engineered for reliability, this 0.4" WC pressure switch operates on a 24V control circuit with a robust 125/360VA rating, ensuring stable electrical performance under varying thermal loads. As a genuine York replacement part, it is optimized for high-demand residential and commercial equipment, providing the accurate set-point detection required to maintain safe blower and burner operation. Whether you are performing a seasonal tune-up or troubleshooting an intermittent lockout, utilizing an HVAC pressure control switch with exact vertical water column (WC) specifications is essential to prevent premature component wear and maintain system efficiency. This industrial-grade sensing switch facilitates seamless communication within the control board logic, ensuring your equipment operates only when proper venting or airflow is detected.

• Factory-Calibrated Precision: Pre-set to 0.4" WC to ensure exact system response and safety compliance.
• OEM Compatibility: Direct replacement for York systems, eliminating the need for field modifications or bracket adjustments.
• High VA Capacity: Rated for 125/360VA to handle the electrical demands of 24V furnace and air handler control circuits.
• Standardized Fit: Compact design allows for drop-in installation in existing pressure switch mounting locations.

What causes a pressure switch error on a York unit?
Most errors stem from restricted airflow, such as a clogged inducer port, pinched tubing, or a blocked flue, though a failing internal diaphragm in the S1-025-21710-002 can also cause intermittent trips.

Can I test this switch with a multimeter?
Yes, technicians can verify continuity across the terminals when the appropriate 0.4" WC vacuum or pressure is applied, ensuring the contacts close as specified.

Is this switch compatible with 120V circuits?
No, this specific control is designed strictly for 24V AC control systems. Attempting to use it with line voltage will result in immediate component failure.

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.