York s1-02435311000 Air Pressure Switch 0.65 Wc

Product Description

The YORK s1-02435311000 is an air pressure switch rated at negative 0.65 inches water column (WC), triggering on a pressure fall. Pressure switches are safety and control devices used in gas furnaces and air handling systems to verify that the inducer motor is creating adequate negative pressure before allowing ignition to proceed. This switch monitors draft pressure and interrupts the control circuit if suction falls outside the acceptable range, protecting the heat exchanger and venting system. Licensed HVAC technicians install and replace this component during routine furnace service, ignition failure diagnosis, or inducer motor replacement.

This pressure switch is suited for residential and light-commercial gas furnace applications where draft-proving is required. It is positioned in the inducer assembly circuit and actuates when the inducer fan establishes sufficient negative pressure. The negative 0.65 inches WC set point places it in the typical range for single-stage or two-stage induced-draft furnaces. When diagnosing a no-heat call, technicians should verify the switch actuation point and inspect the hose port, tubing, and inducer wheel for blockages before condemning the switch.

Key Features

• Set point of negative 0.65 inches water column, actuating on pressure fall
• Designed for induced-draft furnace draft-proving circuits
• Interrupts control board signal if adequate negative pressure is not achieved
• OEM YORK part number ensures correct fit and actuation characteristics
• Single-port hose connection typical of standard furnace pressure switch configuration

Compatibility

Designed as an OEM replacement pressure switch for YORK gas furnace systems requiring a negative 0.65 inches WC on-fall set point. Consult the furnace service label and wiring diagram to confirm correct switch substitution before installation.

Installation Notes

Air pressure switches are installed by licensed HVAC technicians. Shut off power to the furnace at the disconnect or breaker and turn the gas supply to the off position before beginning work. Inspect the rubber hose connecting the switch to the inducer housing for cracks, blockages, or moisture before replacing the switch itself. Follow the equipment wiring diagram and applicable local mechanical codes when reconnecting the control circuit.

Technical Specifications

• Set Point: -0.65 inches WC
• Actuation Type: On Fall
• Switch Type: Air Pressure Switch
• Application: Induced-Draft Gas Furnace

Standard Information

• Brand: YORK
• Manufacturer Part Number: s1-02435311000