OEM Goodman 23 x 20 in Vertical Drain Pan for WAHMS3743P4ACA — B1756020L

The Goodman B1756020L is a genuine OEM vertical condensate drain pan, 23 in x 20 in outside dimension, for the WAHMS3743P4ACA air handler. Installed beneath the evaporator coil in vertical (up-flow/down-flow) configurations, the pan collects condensate and channels it to the drain line. A cracked, corroded, or mismatched pan is a leading cause of ceiling stains, water damage, and float-switch shutdowns — so an exact-fit replacement matters.

Specifications

• Part Number: B1756020L
• Type: Vertical (primary) condensate drain pan
• Dimensions: 23 in x 20 in outside dimension (OD)
• Application: Goodman / Amana air handlers, model WAHMS3743P4ACA
• Orientation: Vertical coil installations

OEM vs. Generic

Generic pans rarely match the WAHMS coil footprint or drain-port location, leading to overflow, poor drainage slope, and improvised sealing. The OEM B1756020L is molded to the exact 23 x 20 footprint with the correct drain connection, ensuring full coil coverage and proper run-off.

Installation

Difficulty: Moderate. Requires pulling the coil to remove the old pan, then re-seating and re-connecting the condensate line — typically 45–60 minutes. Cut power, confirm a slight slope toward the drain, and verify the float switch operates before returning to service.