York S1-025-36115-001 Switch

The York S1-025-36115-001 Air Proving Switch is a critical safety component engineered for York HVAC systems, including packaged rooftop units and residential furnaces. As an HVAC air pressure switch, it functions as a differential pressure sensor, monitoring the supply fan to ensure sufficient airflow before allowing ignition or cooling stages to engage. This OEM replacement part is built with a NEMA 1 electrical enclosure and is compatible with R-410A refrigerant equipment. In commercial rooftop unit maintenance, this switch prevents unit lockouts by verifying the air-proving circuit completes within the required 45 to 60-second window after fan startup. Its rugged steel construction and precision sensing diaphragm are designed to withstand industrial-grade cycles, making it a reliable HVAC furnace part for contractors requiring high-performance airflow verification and field-proven reliability.

Key Benefits

• Compatible with York rooftop units and multi-zone VAV systems for direct OEM replacement.
• Failsafe protection prevents HVAC system overheating by detecting restricted airflow or fan failure.
• Integrated NEMA 1 enclosure ensures secure electrical switch housing in residential and industrial environments.
• High-precision sensing prevents nuisance trips while maintaining strict supply fan proving thresholds.
• Optimized for systems utilizing R-410A refrigerant to maintain peak efficiency and safety compliance.

Common Questions

• What causes a lockout on the York air proving switch? A lockout typically occurs if the switch fails to close within 60 seconds of the fan starting, often due to a broken belt, failed motor, or blocked ductwork.
• Can this switch be used with other HVAC brands? This specific model is an official York OEM part designed for York, Luxaire, and Coleman equipment; cross-referencing specifications is required for non-native applications.
• How do I test the S1-025-36115-001 during a service call? Technicians should verify differential pressure across the sensing ports using a manometer while the blower is operational to ensure the switch reaches its set point.

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.