Nordyne 632422R -1.00″WC SPST Pressure Switch

Description

Nordyne 632422R — -1.00″ WC SPST Pressure Switch

The Nordyne 632422R is a Single-Pole Single-Throw (SPST) pressure switch engineered to monitor and verify proper draft pressure in Nordyne-brand heating equipment. Calibrated to a setpoint of -1.00″ water column (WC), this switch confirms that the inducer motor is generating adequate negative pressure before allowing the ignition sequence to proceed — a critical safety function that protects both the equipment and the occupants it serves.

How It Works

The pressure switch senses the negative pressure created by the draft inducer blower. When the measured pressure reaches the -1.00″ WC setpoint, the SPST contacts close, signaling the control board that safe draft conditions exist and that the heating cycle may continue. If draft pressure is insufficient — due to a blocked flue, failed inducer, or restricted vent — the switch remains open, locking out ignition and preventing the release of combustion gases into the living space.

Key Features

• OEM Nordyne replacement part — ensures proper fit and function
• SPST (Single-Pole Single-Throw) switching action for straightforward integration
• Calibrated setpoint: -1.00″ water column (WC)
• Designed to work with Nordyne-brand furnaces and air handlers
• Provides critical safety lockout protection against improper venting conditions
• Helps maintain system efficiency and extends equipment life

Application

This pressure switch is a direct OEM replacement for Nordyne heating systems that require a -1.00″ WC draft proving switch. Always verify compatibility with your specific model number before installation. Consult your equipment’s wiring diagram and service manual for proper installation procedures.

Why Choose an OEM Pressure Switch?

Using a genuine Nordyne replacement part ensures the switch is calibrated precisely to your system’s design specifications. Aftermarket substitutes may have tolerance variations that can cause nuisance lockouts or, more critically, fail to protect against unsafe venting conditions. Trust OEM quality for safety-critical components.