utilizing this genuine Williams replacement part is non-negotiable for system safety and ensuring the unit meets factory-specified efficiency ratings

a functioning switch must show a closed circuit (0 Ohms or a beep)

075" PF (Pressure Fall) indicates the specific negative pressure threshold required to actuate the switch

check for continuity across the terminals when the switch is cold

it features a 5-blade configuration and a 30-degree pitch

Nordyne 632487R Pressure Switch utilizing this genuine Williams replacementThe 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