A washer that won't drain usually stops mid-cycle and sits there, full of grey water and heavier-than-usual laundry. The good news is that the drain path is short — filter, hose, pump — and most blockages live in the first two. Unplug the machine before you start any of this: you'll be working around standing water, and the pump can kick on without warning if the machine decides to retry the cycle.
Clean the drain pump filter (front-loaders). Behind the small panel at the bottom front is a round filter cap — the machine's coin trap. Most models have a short drain tube beside it: pull the plug and drain the trap into your shallow pan first, a cup or two at a time. Then unscrew the cap slowly. Coins, buttons, hairpins, and a sock's worth of lint felt are the usual catch. Rinse the filter, shine a light into the housing to check the impeller behind it spins freely, and reassemble. This single check fixes the majority of front-loader drain failures.
Check the drain hose for kinks and clogs. The classic kink happens when the machine gets pushed back against the wall and folds the hose flat. Pull the washer out, straighten the hose, and check the end where it meets the standpipe or sink — lint and detergent sludge narrow it over time, and small garments genuinely do escape the drum and lodge in the hose. That sludge is the same residue that films the drum and gasket between washes, and the monthly routine for cleaning a washing machine keeps it from building up in the first place. Run water through it from a tap to confirm it's clear.
Check hose height and the standpipe. Height matters in both directions. A drain hose pushed too far down the standpipe, or sitting too low, can siphon water out as fast as it fills. One mounted too high — most manuals cap it around 8 feet — asks the pump to lift further than it can. Most manufacturers want the standpipe outlet roughly 30–48 inches off the floor; your manual has the exact figure. Also confirm the hose isn't sealed airtight into the pipe — it needs an air gap to drain properly.
Test the lid switch or door lock. Most washers refuse to drain or spin if they think the lid or door is open — it's a safety interlock, not a malfunction. On top-loaders, you should hear a click when you close the lid; no click, or a machine that fills and agitates but never spins out, points at the switch. On front-loaders, a door that won't lock (or a lock that never releases) implicates the latch assembly. This one strands the water without any clog at all.
Look at the load and the suds. A single heavy item — a bath mat, one blanket — can unbalance the drum so the machine aborts the spin and leaves the load soaking. Redistribute or remove half and retry. Excess detergent is the sneakier version: oversudsing from using regular detergent in an HE machine can stall the drain cycle on some models, because the machine reads the foam as a problem. If the tub looks like a bubble bath, that's your answer.
Judge the pump itself. Filter clean, hose clear, switch fine — now listen. A pump that hums but moves no water often has a jammed impeller (a coin or bra strap underwire that got past the filter) or worn-out internals. A pump that's completely silent with power confirmed is likely dead. Replacement pumps are a common, moderately priced part, and swapping one is a realistic DIY on many models — but it's also the point where a lot of people reasonably hand it to a repair tech.
Forcing the filter cap. It unscrews a quarter-turn at a time against water pressure — rushing it floods the floor and cross-threads the cap, turning a free fix into a parts order. Slow, with the pan in place.
Retrying the cycle over and over. A struggling pump overheats. Two attempts to confirm the symptom is diagnostic; ten attempts is how a clogged filter becomes a clogged filter plus a burned-out pump.
Skipping the bail-out. Opening the filter on a full drum without draining first — through the trap's drain tube, or by bailing the drum into a bucket — releases the whole load of water at floor level. It's the same advice as for a dishwasher that won't drain: get the water out on your terms before you open anything.
Filter, hose, height, switch, load, pump — in that order, you'll find the problem at one of the first three stops most of the time, with nothing but towels and a pan spent. If the trail leads to a dead pump or a control-board error code, compare the repair quote against the machine's age before deciding; our breakdown of what plumbers and appliance repairs typically cost will help you sanity-check the number. And if the washer shares a slow standpipe drain with the laundry sink, that sluggishness is a clue of its own — see why your sink drains slowly.
For a front-loader, use the small drain tube next to the pump filter — uncap it into a shallow pan, recap, empty the pan, repeat. For a top-loader without that feature, bail the drum with a cup and bucket. Either way, get as much water out as you can before opening the filter or disconnecting hoses.
A small amount of water in the outer tub, below the drum you can see, is normal — the pump never clears every drop. Standing water visible in the drum itself, soaking the clothes, is not. That's a drain problem, and check 1 is where to start.
Partial blockages drain partially: a filter half-full of lint, a hose narrowed by sludge, or a standpipe that can't keep up. Slow draining usually gets worse, not better, so treat it as the early version of the same problem and run the same six checks.
The part itself is commonly in the $30–$80 range for popular models, and a professional replacement visit often lands around $150–$350 total depending on your area. On a machine past 8–10 years old, weigh that against the price of a new washer and the odds of the next repair.
Yes — drain faults are one of the most common code triggers. Depending on the brand you'll see things like OE, 5C, or F21, all of which essentially mean "water isn't leaving." Check the filter and hose before you believe the code means something electronic.