Westinghouse 632422R Furnace Pressure Switch Spst

Product Description

The WESTINGHOUSE 632422R is a single-port furnace pressure switch rated at 1.20 inches water column (WC), wired in a single-pole single-throw (SPST), normally open configuration. This component functions as an integral safety device within the combustion air proving circuit of a gas heating unit. It monitors negative pressure generated by the inducer motor and closes the circuit only when adequate draft is confirmed, preventing ignition under unsafe venting conditions. Licensed HVAC technicians install and service this switch as part of routine maintenance or venting system diagnostics on package unit equipment.

This pressure switch is specified for use on R4, R6, F6, PDF, and PPG series furnace and package unit applications. It is suited for both single-fuel and dual-fuel package units where venting failure protection is required. The normally open design ensures the gas valve circuit remains interrupted unless proper inducer operation and draft pressure are verified, making it appropriate for residential and light commercial gas heating systems that rely on induced-draft combustion.

Key Features

• Rated at 1.20 inches WC setpoint for accurate draft pressure sensing
• SPST, normally open configuration opens the control circuit on venting failure
• Single-port design for straightforward hose connection to the inducer housing
• Integral safety function protects against unsafe combustion due to blocked or failed venting
• Compatible with both single-fuel and dual-fuel package unit configurations

Compatibility

Designed for use on R4, R6, F6, PDF, and PPG series furnace and package units as specified by the manufacturer.

Installation Notes

Installation and replacement of furnace pressure switches should be performed by a licensed HVAC technician. Disconnect all electrical power to the unit before removing or installing the switch. Inspect the pressure port tubing and hose barb for cracks, blockage, or moisture before connecting the replacement switch. Verify inducer operation and proper draft pressure after installation to confirm correct switch actuation.

Technical Specifications

• Pressure Rating: 1.20 inches WC
• Switch Type: SPST, Normally Open
• Port Configuration: Single Port (1-Port)
• Application: Furnace Pressure Switch
• Used On: R4/R6/F6/PDF/PPG Furnace and Package Units

Standard Information

• Brand: WESTINGHOUSE
• Manufacturer Part Number: 632422R