Westinghouse 632491R Furnace Pressure Switch 1.5 in Wc Spst

Product Description

The WESTINGHOUSE 632491R is a single-port, single-pole single-throw (SPST) pressure switch rated at 1.5 inches water column (WC), designed for use in gas furnace applications. This switch monitors draft pressure to confirm proper inducer operation before allowing the gas valve to open, serving as a critical safety control in the furnace's ignition sequence. Licensed HVAC technicians install and replace this component during routine maintenance or when a failed pressure switch causes a no-heat condition. Its 1.5 inches WC setpoint is specific to the furnace application for which it is rated.

The WESTINGHOUSE 632491R is designed for use on the G7SC-1 Upflow/Horizontal gas furnace. This single-port configuration is typical of pressure switches used in furnaces with a single-stage inducer assembly. The switch fits into the low-voltage safety circuit and opens or closes based on the differential pressure generated by the draft inducer motor during operation. Residential HVAC contractors and service technicians encounter this switch during diagnostic calls involving pressure switch fault codes or inducer-related failures.

Key Features

• Rated at 1.5 inches WC setpoint for precise draft pressure monitoring
• SPST configuration for straightforward open/close safety circuit operation
• Single-port design matches the inducer hose connection on compatible furnaces
• Functions as a safety lockout control to prevent ignition without confirmed draft
• OEM-style replacement for the G7SC-1 Upflow/Horizontal furnace platform

Compatibility

Designed for use on the G7SC-1 Upflow/Horizontal furnace per manufacturer specification.

Installation Notes

Installation of this pressure switch should be performed by a licensed HVAC technician. Power down the furnace and confirm the gas supply is off before removing the existing switch. Disconnect the rubber hose and wiring harness from the old switch before installing the replacement, and verify the hose connection is free of cracks or blockages that could cause a repeat failure. Follow applicable local mechanical codes and manufacturer wiring diagrams when reconnecting the low-voltage circuit.

Technical Specifications

• Type: Pressure Switch
• Switch Configuration: SPST Single Port
• Pressure Rating: 1.5 inches WC
• Application: G7SC-1 Upflow/Horizontal Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 632491R