This kit is designed to return the unit to factory physical specifications

these filters maintain low static pressure even as they load with particulates

monitors the venting system to ensure the combustion blower is moving sufficient air for safe operation before the ignition sequence begins

it typically requires a small pressure differential to function correctly

Carrier KHALS0401LLS Solenoid Valve Kit 321894-708 This kit is designed toThe Carrier KHALS0401LLS is a high performance liquid line solenoid valve kit engineered specifically for bi flow applications in R 410A Puron and R 22 heat pump systems. For veteran technicians, this kit is the standard solution for preventing refrigerant migration during the off cycle, which is critical in residential split systems where the indoor unit is located significantly above or below the outdoor section. Operating on a 24V 120V 50 60Hz