LG Washing Machine Repair in Toronto — Smells musty or mouldy (front-load)

• The #1 musty-smell source on an LG front-load is the door boot/gasket - the warm folded six o'clock pocket where lint, hair and detergent sludge sit in standing water and grow odor-causing mould. LG's own gasket help library is explicit that you should remove any foreign objects found in the groove at the six o'clock position of the door gasket, and that keeping the door closed traps wash moisture so mould may form inside the gasket (LG notes the inside of the machine is prone to moisture and slime). On the WM3360/WM3550 lineage (and the Kenmore Elite 796 LG built) the boot is the genuine MDS47123604 (cross-references AP5332003 / PS3628576; also replaces 2003274 / MDS47123606), the same boot on our leak sheet - here it presents as a smell rather than a drip. We peel the fold, clear trapped debris and wipe with a diluted-bleach or vinegar solution first; only once the rubber is mould-stained into the porous surface or torn at the fold does a fresh boot, model-matched off the serial, actually clear the smell.
• A musty boot that keeps coming back even after scrubbing is usually a clogged gasket drain hole, not worn rubber - this one is field-repair experience rather than something LG spells out on its odor page. LG WM boots have small weep/drain holes at the bottom fold that let fill-water and spin spray escape back into the tub, and when lint and detergent sludge pack them, water can no longer drain so it pools in the fold and ferments between loads. We peel the boot back, locate and flush the drain holes with warm water and a flexible pipe cleaner (never a rigid tool that tears the rubber), and only quote the MDS47123604 boot if the holes are torn or the rubber is permanently fouled - a clogged-drain-hole musty smell is a clean-out, not a part.
• A cause many owners miss is a clogged drain-pump filter/coin trap: unlike some front-loads, LG WM machines DO give the owner an accessible trap behind the lower-front pour-spout/access door, and socks, coins, hairpins, underwire and lint pack it while it sits in stagnant sump water between washes growing a musty smell. LG's maintenance guidance lists cleaning the drain pump filter as part of a monthly tub clean. We pull the access door, drain the little black hose, unscrew the filter cylinder and flush it, and inspect the drain pump 4681EA2001T (AP5328388, supersedes 4681EA1007G / 4681EA1007D / 4681EA2001N) for biofilm - the same pump behind the OE code on our drain sheet, here as the stagnant-water smell rather than a no-drain. A trap clean is a no-part one-visit fix; only a cracked or biofilm-fouled pump that won't clear gets the assembly.
• tCL on the display is not a fault - it is LG's Tub Clean REMINDER (LG triggers it automatically about every 30 wash cycles), and ignoring it is one of the most common reasons an LG front-load goes musty. LG's own guidance prescribes running the Tub Clean cycle 1-2 times a month with an oxygen-based washing-machine cleaner (LG warns that chlorine bleach or acidic cleaners on the Tub Clean cycle can discolor or corrode the inside of the machine), and if a musty smell already exists, running Tub Clean once a week for three consecutive weeks. When the cycle finishes, LG says to leave the door and the detergent drawer open to ventilate and dry residual moisture. This is a chemistry-and-maintenance fix, not a part - we run the Tub Clean, coach the schedule, and only chase hardware once the drum, boot and trap come back clean.
• A sour dispenser smell traces to the detergent-drawer tray and its siphon caps: liquid detergent and fabric-softener residue cakes in the drawer compartments and siphon tubes where it stays damp and grows odour, and LG names cleaning the dispenser drawer (weekly) among its odor fixes. This is the same drawer/siphon on our leaking-water sheet - where a clogged siphon overflows the drawer - here it presents as a smell rather than a leak. We pull the drawer, soak it, and scrub every siphon cap and channel until daylight shows through, a no-part fix, and only replace the dispenser housing if a cap or port is physically cracked.
• HE-detergent overuse and the wrong detergent are LG's documented residue-and-odour cause: too much detergent (or fabric softener) leaves residue that ferments into a sour, musty smell, and LG specifically states that natural detergents like laundry soap can promote microbial growth in the machine. LG recommends HE detergent on its front-loads, dosed to the recommended amount. We coach correct HE dosing, switch the owner off bar-soap/natural detergents, and run a Tub Clean to strip the existing residue before condemning any hardware - this is a usage fix, not a part.
• The honest no-part LG cause named first is leaving the door and drawer closed between loads: LG's odor library states the front-load door is designed to create a watertight seal during washing and spinning, so keeping the door closed between washes can trap moisture and detergent residue and create an environment for odor-causing microbes, and laundry left sitting in the drum feeds them. The fix is to remove laundry promptly and leave the door AND the detergent drawer open between loads so the drum, boot and dispenser dry out. We show owners the door/drawer-open habit and the Tub Clean schedule before selling anything, because most LG musty-smell calls are maintenance and habit, not a failed part.

LG smells musty or mouldy (front-load) in Toronto — the local specifics

• The recurring LG-in-Toronto musty pattern we see is a front-load tucked into a closed basement or closet laundry nook where the door is shut against the wall between every load: the boot fold and the drum never dry, the gasket drain holes silt up with GTA hard-water residue, and the customer reports a mould smell they cannot scrub out. Most of these calls are a boot-and-trap clean-out plus a Tub Clean and a door/drawer-open habit change, not a failed part - the ones that actually need an MDS47123604 boot are where the rubber is already mould-stained into the surface or torn.
• We come to these LG musty calls carrying the door boot MDS47123604 (AP5332003) and the drain pump 4681EA2001T (AP5328388) in case the boot is permanently fouled or the trap/pump is biofilm-locked, plus a Tub Clean / oxygen washer-cleaner sachet, a flexible pipe cleaner and brush for the gasket drain holes and dispenser siphon caps, and a diluted-bleach/vinegar cleaning kit - so the no-part maintenance fix and the boot/pump swap are both handled on the first visit.

For the full LG washing machine module — every fault, part number and code — see LG washing machine repair in Toronto, and for the same fault across all brands the washing machine smells musty or mouldy (front-load) guide.