OEM Goodman 23x20 Vertical Drain Pan for WAHMV3137P4AAA — B1756020L

The Goodman B1756020L Vertical Drain Pan is the genuine OEM condensate pan (23 x 20 inch outside dimension) for the WAHMV3137P4AAA air handler installed in the vertical (upflow/downflow) orientation. The pan collects condensate dripping off the evaporator coil and channels it to the drain line. A cracked, warped, or algae-clogged pan causes overflow, water damage, and float-switch trips — installing the correct OEM pan restores reliable drainage.

Specifications

• OEM Part Number: B1756020L
• Dimensions: 23" x 20" outside dimension (OD)
• Orientation: Vertical (upflow/downflow) coil pan
• Equipment: Air Handler
• Compatible Model: WAHMV3137P4AAA
• Brand: Goodman (also fits matching Amana air handlers)

OEM vs. Generic

This factory OEM Goodman pan is molded to seat precisely under the coil with the drain port and slope positioned exactly as designed. Generic pans may not align with the coil footprint or drain fitting, leading to pooling and leaks. For a watertight fit on the first try, OEM is the reliable choice.

Installation Difficulty

Moderate. Requires pulling the coil to remove the old pan, transferring the drain fitting, and re-seating the coil with proper slope toward the drain. Plan 45–75 minutes; have a wet/dry vacuum on hand. Always disconnect power and verify the drain line is clear before servicing.