York S1-1PS3306 High Altitude Pressure Switch

Description

York S1-1PS3306 High Altitude Pressure Switch

The York S1-1PS3306 is an OEM replacement high altitude pressure switch engineered specifically for York heating equipment installed at elevated locations. At higher altitudes, reduced air density affects combustion airflow and inducer performance — this pressure switch is calibrated to account for those conditions, helping maintain safe and efficient furnace operation where standard pressure switches may not perform reliably.

Why High Altitude Matters

Standard pressure switches are factory-set for sea-level air density. When a furnace operates at significant elevation, the inducer motor must work differently to move the same volume of combustion air. A high altitude pressure switch is recalibrated to trip at the correct pressure differential for those conditions, preventing nuisance lockouts and ensuring the furnace proves proper draft before allowing ignition.

Key Features

• OEM York replacement part — direct fit for compatible York furnace models
• Calibrated for high altitude operation to ensure accurate pressure sensing at elevation
• Monitors inducer/draft pressure to verify safe combustion airflow before ignition
• Helps prevent unsafe furnace operation due to blocked flue, failed inducer, or improper draft
• Supports reliable system lockout protection under abnormal pressure conditions
• Built to York OEM specifications for dependable long-term performance

Application

• Replacement for failed or out-of-calibration pressure switches in York furnaces at high altitude installations
• Suitable for residential and light commercial York heating systems requiring altitude-specific pressure switch calibration

Product Details

• Brand: York
• Part Number / SKU: S1-1PS3306
• Type: High Altitude Pressure Switch
• Application: York furnace/heating equipment