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The Goodman B1756028L is an OEM horizontal condensate drain pan built for ARPF486016CA air handlers configured for horizontal (attic or crawlspace) installation. In horizontal applications the pan does double duty—capturing condensate from the coil and acting as the secondary containment surface—so a precise, factory-correct fit is critical to keep water off framing and ceilings below.
Horizontal pans are far less forgiving than universal flat pans. The B1756028L is contoured to the ARPF cabinet so the coil sits correctly and condensate flows to the primary drain rather than pooling. Generic substitutes rarely match the slope and outlet location, which can lead to standing water and overflow into the secondary pan. OEM eliminates that risk.
Difficulty: Moderate. The coil must be slid out to replace the pan; budget 60–90 minutes with hand tools and a wet/dry vac. Verify proper pan slope toward the drain and test the secondary float switch before closing the cabinet. Professional installation is recommended.