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The Goodman B1756028L Horizontal Drain Pan is a genuine OEM condensate pan designed for ARPF37431BA air handlers installed in the horizontal (side-lying) orientation. It collects condensate from the evaporator coil and directs it to the secondary drain port, protecting attic and crawlspace installations from costly water damage.
Horizontal applications are especially sensitive to pan fit — even a small misalignment causes overflow. This OEM pan is contoured to the coil and matches the factory drain locations exactly, ensuring correct pitch toward the outlet. Generic pans rarely match horizontal coil geometry and risk pooling water. OEM is strongly recommended here.
Moderate. The coil must be slid out to replace the pan. Budget 1-1.5 hours; ensure the new pan is sloped toward the drain and the secondary drain is verified before closing up. Service experience recommended.