Description
The York S1-024-40873-000 is an OEM replacement pressure switch engineered for use in York HVAC systems. Featuring a Single Pole Normally Open (SPNO) configuration with a “Close on Fall” operating action, this switch is designed to monitor system pressure and close the circuit when pressure drops to or below the 0.85″ water column (WC) set point. This functionality is critical for protecting furnace and air handler components by verifying proper draft or inducer operation before allowing ignition to proceed.
Key Features
- OEM York replacement pressure switch — direct fit for compatible York equipment
- Set point: 0.85″ WC (water column)
- SPNO (Single Pole Normally Open) configuration
- Close on Fall action — circuit closes when pressure drops to set point
- Designed to confirm adequate draft inducer or combustion air pressure
- Helps prevent unsafe ignition attempts under low-pressure or blocked-flue conditions
- Reliable safety control for residential and light commercial York furnace applications
Application
This pressure switch is a key safety component in York gas furnaces and air handlers. It monitors the negative pressure (vacuum) created by the draft inducer motor. If the inducer fails to establish the correct pressure differential, the switch remains open, preventing the ignition sequence from proceeding and protecting the heat exchanger and venting system from damage.
Specifications
- SKU: S1-024-40873-000
- Brand: York
- Switch Type: SPNO (Single Pole Normally Open)
- Operating Action: Close on Fall (pressure drop)
- Set Point: 0.85″ WC
- Application: York furnace / air handler draft pressure sensing
Reviews
There are no reviews yet.