A washer that is not draining almost always has something blocking the water on its way out: a clogged pump filter, a drain hose that got kinked when the machine was pushed back, a slow drain in the house plumbing, or a tub so full of suds that the pump cannot move it. Each of those can be checked with towels, a shallow pan and a little patience before anyone opens the cabinet. Phoenix water is hard, and in Biltmore laundry rooms the mineral scale it leaves tends to bind lint and detergent film inside the pump housing, so drains often get slower for weeks before the machine finally quits with a full drum.
Get the standing water out first
Unplug the washer and close both faucets behind it. On a front-loader, open the small panel at the bottom front; most European machines, including Bosch, Miele, Asko and Fisher and Paykel, hide a short emergency drain tube and the pump filter there. Lay down towels, hold a baking dish or dustpan under the tube and release the water a little at a time. If the last cycle was hot, give it time to cool. On a top-loader, scoop the water out with a bucket, or lower the drain hose into a bucket on the floor so gravity empties the tub.
Clean the drain pump filter
The catch filter in front of the pump is where coins, hair ties, baby socks, bra wires and lint end up. Bosch tells owners of the WGA12400UC to clean the pump behind the maintenance flap at least once a year, and any time the machine shows a blockage or starts rattling. The same manual warns that water stays trapped in the housing, so the cap should be turned out slowly over a towel. Rinse the filter, shine a flashlight into the opening and spin the impeller gently with a finger if you can reach it. Then thread the cap back until it seats firmly. A cover that is not fully tightened can leak and will also trigger a drain fault on some models.
Check the hose and the house drain
Pull the machine out a few inches and run your hand along the drain hose. Hoses get pinched against the wall or folded under the cabinet when a washer is slid back after cleaning. Bosch lists an outlet hose that is mounted too high, or one that is kinked, among the reasons its machines fail to pump water out. Next, test the plumbing on its own: pour a full bucket of water into the standpipe or laundry sink. If it backs up or gurgles, the clog is in the house drain rather than the washer, and a plumber or a drain auger is the right fix.
Read the code before you guess
Modern machines usually tell you what they sensed. On the Bosch WGA12400UC, the codes E:36 -10, E:30 -80 and E:18 all mean the wash water is not being pumped away, and the manual sends you to the same short list: a kinked or raised outlet hose, a blocked drain pipe or hose, a clogged pump or loose pump cover, or an overdose of detergent. E:30 -20 is treated as a critical fault. Turn off the faucet, wait about 5 minutes while the washer empties itself, then restart it, and call for service if it returns. Too much detergent or water added by hand can also set it off.
Not every stopped cycle is a drain problem. E:60 -2B, E:32 or H:32 means the spin was cut short because the load was lopsided, which leaves clothes dripping but the pump fine; spread the laundry out and run spin again. For any other code, Bosch advises a restart, then disconnecting power for at least 30 seconds if it comes back, then a service call with the exact message written down. Miele, Asko and Fisher and Paykel use their own drain messages, so keep the manual handy. Our Bosch washer repair page covers those machines in more detail.
Suds and buildup
High-efficiency washers use very little water, and too much soap turns it into foam the pump struggles to move. Many machines pause and try to rinse the suds away, which looks like a drain failure from the laundry room door. Run a rinse and spin with no detergent, then cut the dose on the next load. Residue also builds up in the drum and sump over time. Bosch recommends its Drum Clean program, run empty with oxygen-bleach washing powder or an interior care cleaner, after 20 washes at Hot or lower, after a long stretch of non-use and at least once a year. That last point matters in houses closed up through the Phoenix summer, where a washer sitting idle for months can come back slow to drain.
When the pump or controls are at fault
If the filter, hose and house drain are all clear, listen during a drain step. A hum with no water moving points to a seized impeller or a worn pump motor. Silence suggests the pump is not getting power, which may come down to a wiring connector, the control board or, on top-loaders, a lid switch that does not register a closed lid. Those are jobs for a technician with a meter and the right replacement part. You can read more on washer repair in Biltmore, or call (623) 240-9400 to have the washer looked at in your home.