Nordyne 632547R Pressure Switch 321894-708 or a total lack of

or a total lack of spark during the ignition trial are primary indicators that the module requires testing or replacement

Internal Scaling: Features field-selectable jumpers to optimize resolution for small motors or large industrial loads

ensuring probe runs are kept separate from high-voltage conduit

preventing the premature bearing failure and excessive vibration often associated with aftermarket alternatives

Nordyne 632547R Pressure Switch 321894-708 or a total lack ofThe Nordyne 632547R Pressure Switch is a critical OEM furnace safety control engineered to monitor proper inducer motor draft and venting conditions in high efficiency heating systems. This SPST (Single Pole, Single Throw) switch is factory calibrated to a precise 0. 90" WC (Water Column) set point, ensuring the combustion process only initiates when safe airflow thresholds are met. As a genuine Nordyne replacement part, it eliminates the calibration