while factory-set at 3

Stainless Steel Construction: Resists oxidation and corrosion

offering both foot mounting and a 1/2-inch single threaded hub for secure attachment to junction boxes or control panels

the V-4440-1002 is designed for three-way valve applications

High-Flow Expanded Outlet: An oversized 1-inch discharge port allows for rapid pressure reduction during emergency blow-off events

Carrier HK61EA018 Circuit Board 318518-761 while factory-set at 3The Carrier HK61EA018 Circuit Board is the definitive OEM replacement control board for residential HVAC systems utilizing X 13 permanent split capacitor (PSC) or constant torque motors. As a direct successor to the HK61EA013, this integrated furnace control manages critical timing and logic for the blower motor, inducer, and ignition sequence. This Carrier furnace control board is engineered to withstand the thermal stress and electrical fluctuations