Nordyne 632566 Pressure Switch

The Nordyne 632566 Pressure Switch is a critical safety component designed for specific gas-fired furnaces and packaged units. As the direct replacement for 632566R, this differential pressure switch monitors the pressure drop across the heat exchanger, ensuring the induced draft motor is evacuating flue gases effectively before allowing the ignition sequence to proceed. This single-pole, normally open switch is calibrated to precise OEM specifications to prevent nuisance tripping while maintaining strict combustion safety standards. When troubleshooting furnace pressure switch failure, verify the set point and diaphragm integrity, as this component is essential for detecting restricted vents or failing draft inducer blowers. This OEM Nordyne HVAC part ensures seamless compatibility and reliable performance in high-demand heating applications, maintaining the system's static pressure requirements for safe operation.

• Direct OEM replacement for part 632566R, ensuring identical mounting and electrical connections for faster installs.
• Built for high-cycle reliability, reducing callbacks related to intermittent ignition failures.
• Maintains combustion safety by preventing gas valve operation during inadequate venting conditions.
• Engineered specifically for Nordyne, Miller, and Intertherm furnace configurations.

What causes a pressure switch to stay open?
An open switch usually indicates a blockage in the vent pipe, a restricted condensate drain, or a failing inducer motor that cannot reach the required RPM to close the diaphragm.

Can I use a universal pressure switch instead of the 632566?
It is highly recommended to use this OEM replacement part because the specific WC (Water Column) set point is calibrated for the furnace's heat exchanger design to ensure safe exhaust levels.

How do I test the 632566 pressure switch?
Use a manometer to check the actual pressure produced by the inducer and a multimeter to ensure the switch shows continuity once the set point is reached.

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.