Description
The Nordyne 632488R is an OEM replacement pressure switch engineered for precise draft and combustion air proving in Nordyne-family furnaces and air handlers. With a factory-calibrated setpoint of -0.75″ w.c. (water column), this single-pole, single-throw (SPST) switch reliably monitors negative pressure in the flue or inducer circuit, opening the control circuit if safe operating pressure is not achieved — helping prevent unsafe ignition attempts.
Key Features
- Setpoint: -0.75″ w.c. (water column) — factory calibrated for precise actuation
- Switch Type: SPST (Single-Pole, Single-Throw) — opens on pressure loss for fail-safe operation
- Connection Type: Barb fitting — compatible with standard rubber or silicone pressure tubing
- OEM Nordyne replacement part — engineered to match original equipment specifications
- Monitors draft inducer or combustion air pressure to verify safe operating conditions before ignition
- Helps protect heat exchanger integrity by preventing furnace operation without confirmed airflow
Application & Compatibility
Designed as a direct OEM replacement for Nordyne, Frigidaire, Gibson, Tappan, Westinghouse, and affiliated brand furnaces that specify the 632488R pressure switch. Always verify compatibility with the original equipment model number before installation.
Why Pressure Switches Matter
The pressure switch is a critical safety component in modern gas furnaces. It confirms that the draft inducer motor is operating and that proper negative pressure exists in the flue system before allowing the ignition sequence to proceed. A failed or out-of-spec pressure switch can cause no-heat calls, nuisance lockouts, or — if bypassed — unsafe furnace operation. Replacing with a genuine OEM-spec part like the Nordyne 632488R ensures accurate setpoint performance and long-term reliability.
Installation Notes
- Disconnect power before servicing
- Verify pressure tubing is free of cracks, blockages, or moisture before connecting
- Confirm setpoint matches original switch specification for the furnace model
- Use appropriate barb tubing size to ensure a secure, airtight connection
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