Nordyne 632448R Pressure Switch

The Nordyne 632448R Pressure Switch is an essential safety component engineered for precise differential air pressure sensing in residential gas furnaces and HVAC systems. As a Single Pole Single Throw (SPST) switch, it is factory-set to trip at 1.65 inches water column (1.65" WC), ensuring the inducer motor maintains the specific vacuum required for safe combustion and proper flue exhaust. This OEM Nordyne replacement part features a standardized 1/4 inch barbed connection for easy integration with standard pneumatic tubing and is a direct drop-in for legacy part numbers including 632304 and 632448.

Designed for durability in high-cycle environments, this switch monitors the pressure differential across the heat exchanger or vent system. If the furnace draft falls below the 1.65" WC threshold, the 632448R pressure sensing switch will break the electrical circuit, preventing the ignition sequence and protecting the unit from overheating or carbon monoxide buildup caused by inadequate ventilation. This is a critical furnace safety switch for maintaining HVAC system reliability and meeting manufacturer specifications for Intertherm, Miller, and Nordyne equipment.

• Precise Calibration: Factory-calibrated to 1.65" WC for consistent performance and accurate draft pressure monitoring.
• Direct OEM Compatibility: Serves as a streamlined replacement for Nordyne 632448 and 632304, reducing troubleshooting time in the field.
• Secure Pneumatic Seal: The 1/4 inch barbed connection provides a tight, vibration-resistant fit for standard pressure switch tubing.
• Safety Compliance: High-quality SPST configuration ensures immediate system shutdown during ventilation failure or blocked flue conditions.
• Versatile Application: Optimized for use across a wide range of Nordyne-produced gas furnaces and air handlers.

What does a 1.65" WC rating indicate?
This rating specifies the set point at which the switch activates or deactivates. For the Nordyne 632448R, the system must reach a vacuum of 1.65 inches water column to close the circuit and allow the furnace to fire.

Can I use this to replace a switch with a different WC rating?
No. HVAC pressure switches must match the manufacturer's specified water column rating exactly. Using an incorrect rating can lead to dangerous operating conditions or frequent furnace lockout.

What are the signs of a failing 632448R switch?
Common indicators include the inducer motor running continuously without ignition, or the system triggering a pressure switch stuck open diagnostic code on the furnace control board.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.