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The Goodman B1756028L Horizontal Drain Pan is a genuine OEM condensate pan designed for horizontal installations of the ARUF048-00A-1A air handler, such as attic and crawlspace applications where the unit is laid on its side. In horizontal orientation the pan runs the full length of the coil to capture condensate that would otherwise drip across the cabinet, making a properly fitted pan essential to preventing water damage in hard-to-reach install locations.
Horizontal pans are orientation-specific and tightly matched to the coil slab and drain-outlet geometry. This OEM B1756028L pan is the correct factory part for horizontal ARUF048 setups; generic pans typically will not seat or drain correctly in a side-lying configuration, which is especially problematic in attic installs where leaks go unnoticed. OEM is strongly recommended here.
Moderate to Advanced. Requires partial disassembly of the coil section and re-routing the condensate connection, often in a confined attic or crawlspace. Disconnect power first. Estimated time: 60–120 minutes. Best performed by a qualified HVAC technician.