OEM Goodman 23x20 Vertical Drain Pan for ARPF36421BA — B1756020L

The Goodman B1756020L Vertical Drain Pan is a genuine OEM condensate pan sized 23 x 20 inches OD for ARPF36421BA air handlers configured in the upflow/vertical position. It collects condensate from the evaporator coil and channels it to the drain connection, protecting the cabinet, blower, and surrounding ductwork from water damage and corrosion.

Specifications

• OEM Part Number: B1756020L
• Part Type: Vertical (upflow) condensate drain pan
• Outside Dimensions: 23 in. x 20 in.
• Fits Model: ARPF36421BA (Air Handler)
• Material: Corrosion-resistant molded plastic
• Orientation: Vertical / upflow installations

OEM vs. Generic

This genuine Goodman OEM pan matches the original drain port location, coil footprint, and mounting tabs exactly. Aftermarket pans often miss the drain alignment or coil seat, leading to overflow, leaks, and water damage. OEM fit ensures proper drainage slope and a leak-free seal the first time.

Install Difficulty

Moderate — the coil typically must be lifted to slide the old pan out and the new one in, then the drain line re-connected. Plan 45–60 minutes. Verify the slope toward the drain and test with water before closing the cabinet.