The Carrier B03456 Harness Assy is a critical OEM replacement control board harness engineered for precise integration within residential HVAC systems

The first stage utilizes multiple layers of fiber media and a screen to capture large particulate

the 66763 HVAC motor and furnace draft inducer provide the precise static pressure required to clear combustion gases and prevent pressure switch trips in mid-to-high efficiency residential systems

it provides superior protection against the environmental debris and moisture commonly encountered in outdoor settings

The step-down control transformer features standard spade terminals for rapid field wiring

Laars Heating Systems V2019600 Valve 323613-751 The Carrier B03456 Harness AssyThe Laars Heating Systems V2019600 Valve is a specialized Dungs GB ND 057 gas train component engineered for high efficiency modulating boiler systems. This zero pressure regulator and safety shut off assembly is designed to maintain a consistent gas to air ratio, supporting a modulation range of up to 1: 10. By regulating the injector pressure toward zero relative to the vacuum generated by the blower, the V2019600 gas valve ensures stable combustion