Parts for WM3900HBA00 — Washer

We found 9 parts confirmed to fit the Washer WM3900HBA00.

Compatibility table

Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.

Common failure areas on this model

The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.

General hardware and mounting parts

Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.

Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.

Parts in this group on WM3900HBA/00: AHL72914413 (ROTOR ASSEMBLY), EBF61315802 (LG Washer Door Lock EBF61315802), 4738ER1004B (LG Washer Dispenser Hose).

Storage, trim and cosmetic hardware

Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.

Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.

Parts in this group on WM3900HBA/00: MCU62441102 (Washer Dispenser Drawer Housing), 4861ER2001J (Washer Door Boot Spring Clamp, Outer 4861ER2001J).

Controls, timers and wiring

Symptom: A cycle that doesn't advance, the wrong water level filling, an unresponsive display, or the washer not starting at all.

Check: Look for burn marks or a burnt smell near the board or terminals, and check whether buttons and knobs respond -- a unit that powers on but won't cycle often traces back to this group.

Parts in this group on WM3900HBA/00: 4769ER4001B (Washer Vent Bellows Float).

Suspension and tub hardware

Symptom: Excessive vibration, banging, or the machine "walking" during the spin cycle.

Check: Check that all leveling legs are actually contacting the floor, then inspect the suspension rods or springs for wear or a broken mount point.

Parts in this group on WM3900HBA/00: MHY62964802 (Washer Suspension Spring).

Water inlet and drainage

Symptom: A washer that won't fill, fills slowly, won't drain, or leaves standing water in the tub.

Check: For fill problems, check the inlet valve's screen filters for sediment. For drain problems, check the pump for a jammed object and confirm the drain hose isn't kinked or looped too high.

Parts in this group on WM3900HBA/00: 5221ER1003S (Refrigerator Single Coil Water Inlet Valve), 5220FR2006Z (Washer Water Inlet Valve).

Before you buy

Match WM3900HBA00 exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.

How to confirm this is your model

On most washers, the model and serial plate sits under the lid or on the back panel. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.

Other washer models

These model numbers sort close to this one in the catalog for the same appliance type. The brand is not confirmed to match, but the model number range is close.

• WM3900HWA — 9 parts
• WM3987HW — 10 parts
• WM3988HWA — 10 parts
• WM3997HWA/00 — 11 parts
• WM3998HBA/00 — 9 parts
• WM3885HWCA — 10 parts
• WM3885HCCA — 10 parts
• WM3875HWCA — 10 parts
• WM3875HVCA — 10 parts
• WM3770HWA/00 — 10 parts

Still not sure?

Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.