OEM Goodman Horizontal Drain Pan for WAHMS3642P4ABA Air Handler — B1756028L

Goodman B1756028L Horizontal Drain Pan

The Goodman B1756028L is a genuine OEM horizontal condensate drain pan built for WAHMS3642P4ABA air handlers installed in attic, crawlspace, or closet horizontal applications. When an air handler is laid on its side, the drain pan geometry changes to keep condensate flowing toward the drain outlet — this pan is shaped specifically for that horizontal coil position so water never pools or backs up into the cabinet.

Specifications

• Orientation: Horizontal air handler configuration
• Material: Corrosion-resistant molded composite
• Sloped base for positive condensate drainage
• Fits: Goodman WAHMS3642P4ABA air handlers
• OEM part number: B1756028L

OEM vs. Generic

Horizontal pans are far less forgiving than universal pans because the slope and outlet position must match the coil exactly. The genuine Goodman B1756028L guarantees correct drainage angle and a sealed fit against the factory drain stub. Generic substitutes frequently cause slow leaks and overflow switch trips.

Installation Difficulty

Moderate to advanced. Horizontal coils must be partially withdrawn to replace the pan, and the unit must be re-leveled afterward. Budget 45–60 minutes. Always verify the condensate line and float switch operate before closing the cabinet.