How do I identify the proper terminal connections

The Heil Quaker ICP 1171000 Circuit Board is an OEM replacement fan coil control board engineered for high-efficiency HVAC performance

installing a fresh 30046335-859 during every disassembly is standard practice to secure the 8100 Series' performance

and contaminants are present

and the PSE-AM2

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