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The Goodman B1796632 Seal and Nut is a genuine OEM 3/8-inch fitting kit for ARPF37431BA air handlers. It seals the flowrator/refrigerant fitting connection, providing a leak-tight joint that maintains system charge and prevents refrigerant loss at the metering device.
A sealing surface that is off by a fraction will weep refrigerant and trigger low-charge faults. This OEM seal and nut are dimensioned to the factory fitting for a guaranteed leak-free seal. Generic O-rings or nuts may not seat correctly under refrigerant pressure — OEM is the safe choice.
Intermediate to advanced. If the fitting is on the sealed side, recovery and recharge are required and a certified technician is needed. Always replace the seal whenever the fitting is opened.