632546R Nordyne Dual Pressure Switch
632546R Nordyne Dual Pressure Switch
Product Overview
632546R is a genuine OEM Nordyne dual-pressure switch engineered to monitor both low- and high-pressure conditions in gas furnaces and packaged units. By verifying that the inducer and heat-exchanger plenum maintain correct pressure differentials before ignition, it safeguards combustion safety and ensures reliable system starts.
Technical Specifications
| Specification | Detail |
|---|---|
| Pressure Setpoints | 0.6 in WC (low) / 1.0 in WC (high) |
| Switch Type | SPDT automatic-reset dual-pressure switch |
| Port Connections | Two 1/4 in barbed fittings |
| Terminals | Two 1/4 in male quick-connect spades |
| Housing Material | High-impact thermoplastic |
| Operating Temperature | –40 °F to 150 °F |
| Net Weight | 0.03 lb |
Cross-Reference Part Numbers
| OEM Part Number | Notes |
|---|---|
| 632546R | Current OEM dual-pressure switch |
Compatibility
Fits Nordyne, Nordyne Miller, Intertherm, and private-label gas furnaces or packaged HVAC units originally equipped with a 1.0/0.6 in WC dual-pressure switch.
Before ordering, always verify:
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Furnace data-plate pressure requirements
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Tubing size and routing for both low- and high-pressure ports
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Control-board interlock sequences
Technician Notes
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De-energize power and shut off the gas supply; follow lockout/tagout procedures.
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Remove the access panel and locate the existing pressure switch bracket.
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Photograph or label each tubing lead and spade-terminal connection to preserve orientation.
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Depress the mounting clip to release the old switch; disconnect barbed tubing and spade leads.
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Snap the new 632546R into place, seat both 1/4 in barbs, and reconnect the spade terminals.
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Restore power and initiate a heat call; confirm the switch closes at 0.6 in WC and opens at 1.0 in WC.
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Use a manometer to verify setpoints and inspect tubing for leaks, kinks, or blockages before closing panels.