Westinghouse 632489R Furnace Pressure Switch 0.70 in Wc

Product Description

The WESTINGHOUSE 632489R is a single-port, SPST furnace pressure switch rated at 0.70 inches water column (WC). Pressure switches monitor the negative pressure generated by the inducer motor during the ignition sequence. If the required draft pressure is not achieved, the switch prevents the furnace from entering the ignition stage, protecting the heat exchanger and ensuring proper venting. This switch is a direct OEM-style replacement intended for installation by a licensed HVAC technician on compatible Westinghouse upflow and horizontal gas furnace models.

The 632489R is specified for use on G7SA-1 and G7SK-1 upflow and horizontal furnaces. These are residential gas furnace configurations where the pressure switch monitors inducer performance as part of the safety interlock sequence. The single-port design and 0.70 inches WC setpoint match the original factory specification for these units, making this a direct drop-in replacement during service calls or scheduled maintenance.

Key Features

• 0.70 inches WC setpoint matches OEM specification for accurate draft pressure monitoring
• SPST single-port configuration for straightforward wiring and hose connection
• OEM-style replacement designed for G7SA-1 and G7SK-1 furnace platforms
• Protects heat exchanger by interrupting ignition sequence on inadequate inducer draft

Compatibility

Designed for use on Westinghouse G7SA-1 and G7SK-1 upflow and horizontal furnaces, per manufacturer specification.

Installation Notes

Furnace pressure switches are installed by licensed HVAC technicians. Before servicing, shut off power to the furnace at the disconnect switch and set the thermostat to the off position. Inspect the rubber hose connecting the pressure port to the inducer housing for cracks or blockages before installing the new switch, as a compromised hose will cause repeated switch failures. Follow all applicable local codes and manufacturer wiring diagrams when reconnecting the low-voltage control circuit.

Technical Specifications

• Pressure Rating: 0.70 inches WC
• Switch Type: SPST
• Port Configuration: Single Port
• Application: Upflow and Horizontal Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 632489R