Moldy LG Washer Boot Gasket Replaced in Danville, CA

Location: Danville, CA

Appliance: LG front-load washer, model WM3400CW/01, serial 304TNRL2N750, product code F3U8CNU3W.ABWEUUS.

Replacement part used: New washer door boot gasket. The exact service part number was not visible in the supplied photos.

Customer complaint: The original boot gasket was extremely dirty and had heavy black mold inside its hidden folds.

Diagnosis: The outside of the door seal did not show the full extent of the contamination. Inspection inside the gasket folds revealed extensive mold and built-up residue, so surface cleaning alone would not restore the seal.

Cause: Moisture and residue had remained in the concealed folds of the door gasket, allowing mold and grime to accumulate over time.

Repair completed: We disassembled the front of the washer, removed the retaining hardware and contaminated boot gasket, installed the new gasket securely, reassembled the machine, and tested it.

Result: The washer had a clean new door seal, the gasket was secured correctly, and the appliance operated normally after reassembly.

LG washer boot gasket replacement in Danville

The customer in Danville requested replacement of the rubber door boot on an LG front-load washer. The old gasket looked only moderately dirty from the front, but opening its inner folds exposed a much larger amount of black mold and accumulated grime.

A front-load washer boot gasket creates a watertight seal between the tub and the door opening. Its deep folds can trap water, detergent residue, lint, and small debris where they are difficult to see or clean.

Why the old door gasket needed replacement

Light residue on an otherwise sound gasket can sometimes be cleaned. In this case, contamination extended deep inside the rubber folds. The old seal contained extensive dark mold and embedded residue, making replacement the appropriate repair.

The removed gasket demonstrates why a quick visual check around the door opening can be misleading. The exposed surface may appear acceptable while the concealed side of the seal remains heavily contaminated.

Washer disassembly and new gasket installation

Replacing this seal requires access to the tub opening and both retaining points of the boot. We removed the required front components, released the gasket clamps and connections, and took out the contaminated seal without damaging the surrounding washer parts.

The replacement boot gasket was positioned evenly around the tub, secured with its retaining hardware, and seated around the front opening. We then reassembled the washer and checked the installation and operation.

LG WM3400CW model information

The appliance label identifies this washer as LG model WM3400CW/01, serial 304TNRL2N750, product code F3U8CNU3W.ABWEUUS. The complete model and product code should be checked before ordering a door boot because similar LG washers can use different seals.

The exact service part number for the installed gasket was not readable in the supplied repair photos, so no part number is being guessed or attributed to this job.

Final result and gasket care

After installation, the new gasket was clean, correctly aligned, and firmly secured. The washer was reassembled and checked, and the customer was satisfied with the completed repair.

To reduce future buildup, leave the washer door slightly open between loads when practical, wipe standing water from the lower gasket fold, remove trapped debris, and use the washer's tub-clean cycle according to the manufacturer instructions.

Washer repair in Danville

24FAR provides local washer repair in Danville, appliance repair in Danville, and front-load washer repair service. For a moldy, damaged, leaking, or loose washer door gasket, book repair online or call (510) 999-6091.