OEM Goodman Vertical Drain Pan 23 x 20 in for WAHMS3743P4ABA — B1756020L

The Goodman B1756020L Vertical Drain Pan is a genuine OEM condensate pan measuring 23 x 20 inches OD, built for the WAHMS3743P4ABA air handler in vertical (upflow/downflow) installations. It collects condensate from the evaporator coil and channels it to the drain connection, protecting the cabinet and surrounding structure from water damage. Cracked, rusted, or warped pans overflow and cause leaks — this OEM pan restores reliable, code-correct condensate management.

Specifications

• Part Number: B1756020L
• Type: Vertical condensate drain pan
• Dimensions: 23 in x 20 in outside diameter (OD)
• Brand: Goodman (also fits select Amana air handlers)
• Fits Model: WAHMS3743P4ABA
• Equipment: Air Handler (vertical orientation)

OEM vs. Generic

The genuine Goodman pan is molded to the exact coil footprint and drain-port location of the WAHMS3743P4ABA, so it seats under the coil with proper slope and aligns to the factory drain line. Generic pans seldom match the dimensions or port placement, leading to standing water and improper drainage. The OEM pan drops in for a clean, leak-free fit.

Installation Difficulty

Moderate — requires accessing the coil section, removing the old pan, and re-seating the new pan with correct slope and drain connection. De-energize the unit first. Allow 45–60 minutes depending on access.