Westinghouse 632425R Furnace Pressure Switch 0.55 in Wc

Product Description

The WESTINGHOUSE 632425R is a single-port, single-pole single-throw (SPST) pressure switch designed for use in gas furnace systems. Rated at 0.55 inches water column (WC), this normally open (NO) switch monitors negative pressure generated by the inducer motor during furnace operation. When the inducer establishes the correct draft, the switch closes to signal the control board that combustion airflow is adequate. HVAC technicians install this switch as a direct replacement in residential and light-commercial furnace applications where draft-proving is required by the control sequence.

This pressure switch is intended for gas furnace installations where the inducer-driven draft must be verified before ignition is permitted. It is suited for residential furnaces that require a 0.55-inch WC set point for proper pressure sensing. The single-port design connects to one hose barb on the inducer housing or collector box. Technicians working on mid-efficiency or condensing furnaces that have lost draft-proving function will find this a straightforward OEM-style replacement.

Key Features

• 0.55 inches WC set point for accurate draft-proving in the furnace control sequence
• Normally open (NO) contact configuration closes on sufficient negative pressure
• Single-port, single-pole single-throw (SPST) design for simplified hose routing
• Direct replacement form factor reduces installation time
• Compatible with standard furnace pressure switch hose barb connections

Compatibility

Designed as an OEM-style replacement pressure switch for residential and light-commercial gas furnace systems requiring a 0.55-inch WC normally open draft-proving switch.

Installation Notes

A licensed HVAC technician should install this switch. Before servicing, shut off power to the furnace at the disconnect and turn off the gas supply. Disconnect the existing pressure switch hose and electrical connector before removing the switch, and inspect the port hose for cracks or blockages that may have caused the original failure. Verify the replacement set point matches the furnace manufacturer's specification before restoring power.

Technical Specifications

• Type: Pressure Switch
• Set Point: 0.55 inches WC
• Contact Configuration: Normally Open (NO)
• Switch Action: SPST (Single-Pole Single-Throw)
• Port Configuration: Single Port
• Application: Furnace

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 632425R