632445R Nordyne PRESSURE SWITCH -1.10"WC SPST
632445R Nordyne Pressure Switch –1.10″ W.C. SPST
Product Overview
The 632445R Nordyne Pressure Switch is a direct-fit OEM replacement engineered to monitor inducer motor airflow and safeguard furnace operation. Factory-set to trip at –1.10″ W.C. with an SPST contact configuration, it delivers precise, repeatable actuation for consistent system performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Setpoint (Trip Pressure) | –1.10″ W.C. (nominal) |
| Pressure type | Differential vacuum |
| Switch configuration | SPST (normally open until trip) |
| Proof pressure | 2.5″ W.C. (maximum) |
| Burst pressure | 5.0″ W.C. (maximum) |
| Electrical rating | 1 A @ 120 VAC (resistive) |
| Connection fitting | 1/8″ hose barb |
| Housing material | High-impact thermoplastic |
| Terminals | ¼″ quick-connect spades |
| Operating temperature range | –40 °F to 180 °F (–40 °C to 82 °C) |
| Mounting style | Snap-in or bracket mountable |
| Dimensions (L × W × H) | 1.9″ × 1.2″ × 1.3″ (48 × 30 × 33 mm) |
| Weight | 0.10 lb (45 g) |
Cross-Reference Part Numbers
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Nordyne 632445R
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Neuco 632445R
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Coleman 632445R
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Robertshaw PS181
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White-Rodgers 36D47
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OEM equivalent for Bosch-era furnaces
Compatibility
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Nordyne/Coleman N5, N6, P5, P6 series furnaces
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York/Westinghouse standard and high-efficiency units
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Goodman/Amana GSX and GMV series furnaces
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Bryant/Payne single-stage and 80% AFUE models
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American Standard Basic Heat and Performance lines
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Any HVAC system designed for a –1.10″ W.C. pressure switch
Technician Notes
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Disconnect power and verify zero voltage before servicing.
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Use clean, flexible tubing and secure it firmly to the inlet barb—avoid kinks.
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Mount the switch in the original location and orientation to preserve calibration.
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Test actuation with a calibrated manometer or vacuum pump: continuity should close at –1.10″ W.C. and open when vacuum is released.
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Inspect tubing and clamps for wear; replace if cracked or loose.
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Carry extra tubing, clamps, and a spare 632445R for rapid on-site swaps.
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Bundle this switch with inducer motor gaskets and mounting hardware to create a comprehensive service kit.