Description
The York S1-024-40872-000 is an OEM replacement pressure switch designed to provide precise, dependable draft pressure monitoring in York heating systems. Rated at a 0.75″ water column set point, this switch confirms proper inducer operation and safe combustion airflow before allowing the ignition sequence to proceed — a critical safeguard against unsafe furnace operation.
Key Features
- OEM York replacement pressure switch for direct, drop-in compatibility
- 0.75″ water column (WC) set point for accurate draft sensing
- Monitors inducer motor performance to verify adequate combustion airflow
- Prevents ignition sequence from initiating under unsafe draft conditions
- Designed for long-term reliability in residential and light commercial York furnace applications
- Replaces worn or failed pressure switches to restore proper system lockout protection
How It Works
The pressure switch senses the negative pressure (draft) created by the inducer blower during furnace startup. When the inducer reaches the correct speed and generates the required 0.75″ WC pressure differential, the switch closes and signals the control board to proceed with the ignition sequence. If proper draft is not established — due to a blocked flue, failed inducer, or cracked pressure tubing — the switch remains open, locking out the furnace and protecting against incomplete combustion.
Application
- Compatible with select York furnace models requiring a 0.75″ WC pressure switch
- Always verify compatibility with your specific York model number before installation
- Recommended for use by qualified HVAC technicians
Why Choose OEM York Parts?
Using genuine York OEM replacement parts ensures proper fit, function, and system warranty compliance. The S1-024-40872-000 is engineered to meet the exact specifications of your York furnace, delivering the performance and safety you expect from the original equipment manufacturer.
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