Blocked, Seized or Dead: Tracing a Drain Fault
A front-loader that won't drain is almost always one of three things. Work through them in order.
Start With the Filter
The pump filter — sometimes called the drain filter or coin trap — sits behind a small access panel at the bottom front of most front-loaders. Its job is to catch lint, coins, buttons and whatever else makes it through the drum before it reaches the pump impeller. It blocks. Frequently. This is not a fault; it is maintenance that most owners don't know exists.
Before opening it, lay towels down and have a shallow tray ready. There will be residual water in the sump, and it comes out fast. Most filters have a small drain hose clipped alongside them — a thin rubber tube with a cap. Open that first, drain into the tray, then unscrew the filter cap slowly and let the rest drain before pulling the filter clear.
What comes out is usually grey felt-like lint compacted around a coin, a hair clip or a piece of fabric. Clear it, check the filter housing for debris that didn't follow the filter out, and inspect the rubber seal on the cap before reassembly. A cracked seal here causes a slow drip under the machine that looks like a more serious fault.
Refit the filter, run a short spin cycle, and watch the machine. If it drains, that was it.
ON THE BENCH · WHAT TO CHECK AND IN WHAT ORDER
The Hose Kink
If the filter is clear and the machine still won't drain — or drains partially then stops — the outlet hose is the next check. This is the corrugated hose that runs from the pump, up the back of the machine and down into a standpipe or sink trap. It kinks at corners, collapses internally over time if the plastic has fatigued, and can be pushed into a position that creates a siphon or an air-lock.
Pull the machine away from the wall and trace the hose from where it exits the rear panel to where it enters the plumbing. A kink is usually visible. Corrugated drain hose also collapses internally, which looks fine from the outside; straighten the hose and feel along it for a section that doesn't spring back to full diameter.
The standpipe height matters too. If the hose outlet sits less than roughly 60 cm from the floor, the machine can siphon water back as fast as it pumps it out. The manufacturers' minimum standpipe height is usually marked in the installation instructions; if the machine was moved recently and the hose rerouted, check this first.
A hose that has permanently kinked or collapsed needs replacing. The part is inexpensive and connects with jubilee clips at both ends — no special tools, no electrical involvement.
ON THE BENCH · WHAT THIS JOB REQUIRES
The Pump
A drain pump that has seized is a different category of problem from a blocked one, but the diagnosis overlaps. Debris that gets past the filter — a small stone, a bra wire — can jam the impeller without triggering a blockage the filter would show. A seized impeller feels unmistakably solid when you try to rotate it by hand; a free-running pump's impeller turns with light finger pressure through the filter housing.
If the impeller is jammed, remove whatever is stopping it — access is through the same filter housing on most machines — and test again before assuming the pump is dead.
A pump that runs but has no output, or that hums but doesn't turn at all, is electrically failed. At that point, the pump needs replacing rather than clearing. Drain pumps on most front-loaders are held by two or three screws, with a single electrical connector and two hose clips. The part is identifiable from the model number stamped on the pump body itself, and aftermarket units are widely available. The electrical connector carries mains voltage on most machines, so unplug the machine from the wall before touching it. What you must not do is trace the wiring further back toward the control board or interfere with any mains connections; if that's what the fault requires, it needs a qualified engineer.
Most drain faults resolve at the filter. A few at the hose. Pump replacement is real work but straightforward once the other two are ruled out. The order matters: cheapest and fastest first.