Why a washer stops draining
At the end of the wash the control tells the drain pump to run, the pump pushes the water up through the drain hose into the standpipe, and only when the tub is empty does the machine unlock or spin. If the pump is blocked by a sock, a coin or a hair tie, the water stays. If the pump motor has failed, the same. If the hose is kinked or pushed so far down the standpipe that it seals and siphons, water drains slowly or comes back. And on many machines a lid switch or door lock that reads open keeps the drain from ever starting, so the fault looks like a pump when it is a switch.
Charleston laundries add their own twists. Stacked pairs in hall closets from Wagener Terrace to South of Broad sit tight against the wall, and a hose gets crushed each time the machine walks during spin. Sand from Folly and Sullivan’s and shell grit from a creek dock ride in on towels and settle in the pump. Ground-floor and garage washers in Harleston Village, West Ashley and under raised houses on James Island have stood in tidal water or a summer flood, which corrodes pump connectors and control boards, and a machine that took water gets a meter before a verdict. Rentals near the College and North Charleston turnovers push the pump through far more cycles than a family machine.
The usual causes, most to least common
| Cause | What you notice | What we do |
|---|---|---|
| Foreign object jammed in the drain pump | A hum or a rattle at the end of the cycle, then the water just sits; often a small sock or a bra wire is the culprit. | Open the pump housing, clear the object, check the impeller for cracks, run a drain and spin to confirm full flow. |
| Drain pump motor failed | No hum at all when the cycle should be draining, or a hum with no flow and nothing found in the housing. | Meter the pump windings and the feed from the control, replace the pump from the van, test through a complete cycle. |
| Drain hose kinked, crushed or siphoning | Drains slowly, or drains and then refills a little; a stacked closet unit that has crept back against the wall. | Reroute and secure the hose, set the correct height in the standpipe, and confirm a full drain with no backflow. |
| Lid switch or door lock not registering | Machine fills and washes, then stops before the drain; a front-loader that will not release the door. | Meter the switch or lock, replace it, confirm the control sees the door closed and runs the drain and spin. |
| Unbalanced load stalling the spin | Water partly gone, clothes soaked, the machine trying to spin and giving up with a thump or an error code. | Redistribute and test; if it repeats on a balanced load, meter the shock absorbers, suspension and the motor control. |
| Standpipe or house drain clogged | Water backs up out of the standpipe onto the floor while the pump runs normally. | Confirm the pump is delivering, then tell you it is a house drain matter rather than the washer, with no repair charged. |
| Pressure switch or control board fault | Drain never starts or stops early, sometimes with an error code, after everything mechanical checks out. | Meter the pressure switch, its hose and the board outputs, replace the failed part, and run a full wash to spin. |
Safe things to check before you call
- Unplug the washer before touching anything behind it, and bail the tub if water is at the door.
- Look behind the machine for a kinked, crushed or flattened drain hose and straighten it.
- Pull the drain hose up so no more than about eight inches sits inside the standpipe.
- Run a drain-and-spin cycle with the tub empty and listen for a hum or a rattle.
- On a top-loader, close the lid firmly; an open lid switch will block the drain.
- Check the coin trap or small access door on a front-loader for a sock or a hair tie.
When to stop and call
Call when the hose is straight, the lid or door is closed, the coin trap is clear and the tub still holds water, or when the pump hums without moving anything. Call sooner if water has reached the floor in a closet over heart-pine or in a second-floor laundry. Meanwhile, unplug the machine, bail the tub into a bucket, towel the floor and leave the door open so the drum can air. Do not run cycle after cycle hoping it will clear; a pump straining against a jam can burn out. From the peninsula to Mount Pleasant, West Ashley and North Charleston, the visit is usually next day.
Questions about this symptom
My front-loader is full of water and the door will not open. What do I do?
Unplug it and find the small access door low on the front; behind it is a drain hose or a coin trap that lets the tub empty into a shallow pan or towels. Once the water is out, the door lock usually releases. If it does not, or the trap is clean and the machine still holds water, the pump or the lock needs a meter, and the technician brings both.
Why does my Charleston washer drain and then fill back up a little?
That is a siphon. If the drain hose sits too deep in the standpipe, or the standpipe is too low, water flows back once the pump stops. It is common in peninsula closets and garage laundries where the hose was pushed down out of the way. Setting the hose height correctly usually ends it, and the technician checks the pump while there.
My washer stood in tidal water on the ground floor. Can it be saved?
Sometimes, and only a meter can say. Water that stayed below the tub often leaves the pump connector corroded and the motor damp but sound. Water that reached the control panel is usually the end of the board. The technician meters the pump, motor and control before saying a word about price, and the $99 diagnostic is the only cost if it is not worth going on.
How often do you find something jammed in the pump?
On more than half of the washers that will not drain. Socks, hair ties, a bra wire, a coin, a bottle cap from a beach bag and, near the water, oyster shell fragments all end up in the drain pump. The repair is to clear it and check the impeller, and if the pump has been damaged by the jam we replace it from the van in the same visit.
Is a washer that will not drain a same-day call?
It is a next-day call in most cases across Charleston and the areas within twenty minutes of the shop, and same day when water is on the floor or the machine sits above a finished ceiling. We work six days a week, so a Saturday morning call can get a Saturday visit when the schedule allows. The $99 diagnostic is part of whatever repair you approve.