Description
The Nordyne 632452R is an OEM replacement SPST (Single-Pole, Single-Throw) pressure switch engineered to deliver precise, reliable draft-pressure sensing in Nordyne-family heating systems. With a setpoint of -1.00″ w.c. (water column), this switch monitors negative pressure within the vent or flue circuit and interrupts the control circuit if safe operating pressure is not achieved — helping protect the heat exchanger and ensuring proper combustion airflow before ignition is allowed to proceed.
The 1/4″ barbed port connection provides a secure, leak-free attachment to standard rubber or silicone sensing tubing, making installation straightforward for HVAC technicians. The SPST switching configuration means the switch opens or closes a single circuit path, simplifying wiring and integration into existing control boards.
This is a direct OEM replacement part, designed to meet the original equipment specifications for compatible Nordyne, Frigidaire, Gibson, Tappan, and affiliated brand furnaces and air handlers.
Key Features
- OEM replacement pressure switch for Nordyne-family furnaces
- Setpoint: -1.00″ w.c. (water column)
- Switch type: SPST (Single-Pole, Single-Throw)
- Port connection: 1/4″ barbed fitting for standard sensing tubing
- Monitors negative draft pressure to protect heat exchanger and ensure safe ignition sequencing
- Direct drop-in replacement — no modifications required
- Compatible with Nordyne, Frigidaire, Gibson, Tappan, and affiliated brand equipment
Why Replace Your Pressure Switch?
A failed or out-of-calibration pressure switch is one of the most common causes of furnace lockout and no-heat calls. The Nordyne 632452R restores proper safety interlock function, ensuring your system will not attempt ignition unless the inducer motor has established correct negative draft pressure. Using a genuine OEM-specification replacement like the 632452R eliminates guesswork and helps avoid repeat service calls.
Installation Notes
- Always de-energize the unit before servicing
- Verify tubing is free of cracks, kinks, or blockages before installing the new switch
- Confirm the replacement switch setpoint matches the original equipment specification
- Consult the equipment service manual for wiring diagram and terminal identification
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