Description
Ensure safe, reliable operation of your HVAC system with the York S1-031-01123-700 — a genuine OEM air proving switch designed to monitor airflow and verify proper duct or blower pressure before allowing your system to operate. This critical component helps prevent furnace or air handler operation when airflow is insufficient, protecting the system from potential damage or safety hazards.
Key Features
- Airflow monitoring & safety control: Detects pressure changes within the duct/blower system and prevents system operation if airflow is inadequate — crucial for safe furnace ignition or HVAC blower operation.
- OEM-grade, direct replacement: Made by York and matches original equipment specifications — ideal for replacement during maintenance or repair, ensuring correct fit and performance.
- Reliable HVAC integration: Works across compatible York furnaces, air handlers, and HVAC units — helps maintain consistent performance, efficiency, and system longevity.
- Prevents damage and improves safety: By verifying proper airflow before ignition or blower run-up, this switch helps avoid overheating, inefficient operation, or dangerous exhaust conditions.






