OEM Goodman 23 x 20 Vertical Drain Pan for ATUF374316AA — B1756020L

The Goodman B1756020L Vertical Drain Pan is a genuine OEM condensate pan sized 23 x 20 inches (OD) for the ATUF374316AA air handler in vertical/upflow configurations. It sits beneath the evaporator coil and channels condensate to the drain line. Cracked or corroded pans overflow and cause water damage, mold, and float-switch shutdowns — installing the factory pan restores reliable drainage and protects the equipment and surrounding area.

Specifications

• OEM Part Number: B1756020L
• Dimensions: 23 in x 20 in (outside dimensions)
• Orientation: Vertical / upflow application
• Fits Model: ATUF374316AA Air Handler
• Brand: Goodman / Amana (Daikin family)

OEM vs. Generic

OEM pans are molded to the exact coil footprint with the drain outlet in the correct location, so the coil seats flat and water flows to the fitting rather than pooling. Generic pans frequently miss on outlet placement and depth, leading to standing water and slow leaks. For a leak-free seal, OEM is recommended.

Install Difficulty

Moderate. Requires pulling the coil to remove the old pan, then re-seating it and reconnecting the condensate line. Expect 45–60 minutes. Confirm the drain trap is clear while you're in there, and disconnect power before servicing.