Nordyne 632487R Pressure Switch

The Nordyne 632487R Pressure Switch is the official OEM replacement part for the aging 632487 series, specifically engineered to maintain precise combustion safety in high-efficiency gas furnaces. Rated at -0.90" WC (water column), this Single Pole Single Throw (SPST) switch acts as a critical safety interlock by sensing the negative pressure generated by the inducer motor. If the draft inducer fails to meet the required vacuum setpoint due to a blocked vent or motor failure, the switch interrupts the control circuit to prevent hazardous operation. This ensures your heating system only fires when the exhaust path is clear and stable.

Built for long-term reliability in demanding HVACR environments, the 632487R features a rugged housing and highly sensitive diaphragm for consistent pressure differential monitoring. Contractors will find the installation straightforward, as it utilizes standard furnace pressure switch mounting configurations and maintains original factory electrical specifications. This part is compatible with a wide range of Miller, Intertherm, and Nordyne packaged units and furnaces. Verify your specific model numbers on the inducer housing to ensure a technical match.

• Precise Draft Sensing: Calibrated specifically to a -0.90" water column setpoint for exact safety compliance.
• Official OEM Replacement: Direct 632487 replacement ensures no field modifications are required for fitment or wiring.
• Durable SPST Configuration: High-quality internal contacts designed to withstand thousands of heating cycles without signal degradation.
• Broad System Compatibility: Fits various Nordyne gas furnace models, including those under the Intertherm and Miller brand names.

• Will this fix a code for a pressure switch stuck open? If the inducer is running but the circuit won't close, verifying the -0.90" WC vacuum with a manometer is the first step. If the vacuum is present but the SPST switch remains open, this replacement is necessary.
• Does this include the vacuum tubing? This is the switch assembly only; you should reuse your existing high-heat silicone tubing or replace it if it shows signs of cracking.
• Can I use this for a positive pressure application? No, this is a negative pressure sensing element designed for the suction side of the inducer.

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.