OEM Goodman Horizontal Drain Pan for WAHMS3743P4ACA — B1756028L

The Goodman B1756028L is a genuine OEM horizontal condensate drain pan for the WAHMS3743P4ACA air handler. Designed for horizontal coil installations — such as attic and crawlspace mounts — this pan sits under the coil to capture condensate and route it safely to the drain line. Because horizontal applications are especially prone to water damage, a correctly shaped factory pan with the proper slope and drain location is critical to prevent overflow and ceiling leaks.

Specifications

• Part Number: B1756028L
• Type: Horizontal (primary) condensate drain pan
• Application: Goodman / Amana air handlers, model WAHMS3743P4ACA
• Orientation: Horizontal coil installations (attic / crawlspace)
• Function: Collects and drains evaporator condensate

OEM vs. Generic

Aftermarket horizontal pans often miss the WAHMS coil contour and drain-port placement, creating low spots where water pools and eventually overflows. The OEM B1756028L is molded to the exact coil footprint with the factory drain connection and built-in slope, ensuring reliable run-off and float-switch clearance.

Installation

Difficulty: Moderate. Involves removing the coil to access and replace the pan, then reconnecting and pitching the condensate line correctly — typically 45–75 minutes. Shut off power, confirm proper drainage slope, and test the secondary float switch before restoring operation.