How do I identify the proper terminal connections

this part features a 1/2 inch bore

and the PSE-AM2

You must always replace an auto-reset limit switch with the exact OEM-specified reset type and temperature rating to ensure the system’s safety controls function as designed by the manufacturer

and contaminants are present

Nordyne 632477R Pressure Switch Els PW 17895 How do I identify theThe Nordyne 632477R Pressure Switch is an essential OEM safety component engineered for precise airflow monitoring in residential HVAC systems. Featuring a 0. 70" WC set point and SPST (Single Pole Single Throw) configuration, this switch is the direct cross referenced replacement for the legacy 632477 model. Designed to interface with the inducer motor, it ensures that the furnace only initiates ignition when a safe negative pressure and proper flue