Westinghouse 632487R Furnace Pressure Switch 0.90 in Wc

Product Description

The WESTINGHOUSE 632487R is a single-port, single-pole single-throw (SPST) pressure switch rated at 0.90 inches water column (WC), designed for use in gas furnace applications. This switch monitors the negative pressure generated by the inducer motor during furnace operation. When the correct draft pressure is established, the switch closes and signals the control board to proceed with the ignition sequence. Licensed HVAC technicians install this component as part of routine furnace maintenance or when diagnosing induced-draft or pressure-related lockout faults.

This pressure switch is suited for residential gas furnace installations where a 0.90 inches WC setpoint is specified. It is a single-port design, meaning it monitors one pressure reference point in the venting or combustion air system. Technicians typically encounter this switch during service calls involving draft-proving faults, nuisance lockouts, or failed pressure switch diagnostics on induced-draft furnace systems.

Key Features

• 0.90 inches WC setpoint for precise draft pressure sensing
• SPST configuration provides a clean open or closed circuit signal to the furnace control board
• Single-port design simplifies installation and hose routing
• OEM-style replacement for gas furnace pressure switch service

Compatibility

Designed as an OEM-style replacement pressure switch for residential gas furnace systems requiring a 0.90 inches WC SPST single-port switch. Verify the setpoint and port count against the original switch before installation.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable mechanical codes. Shut off power to the furnace at the disconnect and set the thermostat to the off position before removing the existing switch. Inspect the rubber hose connecting the switch to the inducer housing for cracks or blockages before installing the replacement. Do not energize the system until all hose connections are secure and the panel is reinstalled.

Technical Specifications

• Type: Pressure Switch
• Pressure Setpoint: 0.90 inches WC
• Switch Configuration: SPST
• Port Configuration: Single Port
• Used On: Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 632487R