Carrier EF32CB209 Gas Valve 321042-401 While the 945 BOM includes

While the 945 BOM includes starting components and a crankcase heater

Designed to evacuate combustion byproducts efficiently

meaning it generally requires a minimum pressure differential (typically 5-10 PSI) to lift the diaphragm effectively

which eliminates the need for extensive interconnect wiring between components

Note that the A28PJ-1 is functionally identical to the A28PJ-1C model

Carrier EF32CB209 Gas Valve 321042-401 While the 945 BOM includesThe Carrier EF32CB209 is a factory authorized 24V natural gas valve designed for precise fuel regulation in residential and commercial furnaces. Engineered as a genuine OEM replacement part, this 1 2 inch NPT valve maintains a consistent 3. 5" WC (Water Column) manifold pressure to ensure stable combustion and reliable ignition cycles. It is a direct fit for various Carrier, Bryant, and Payne models, including the BS2AAN and BW3AAN series, and serves