What Causes Washing Machine Not Drain and How to Fix It
A practical, step-by-step guide to diagnose and fix a washer that won’t drain. Learn common causes, safe checks, and when to call a pro.
The most common cause for a washer not draining is a clogged drain system—often a blocked filter, kinked drain hose, or a failed pump. Start with simple checks: inspect the drain hose for kinks, clean the lint filter if your model has one, and run a quick drain-test. If it still won't drain, proceed with deeper diagnostics.
Common symptoms of drainage problems
The washer may leave water standing in the tub, fail to spin, or drain partially. The phrase 'what causes washing machine to not drain' is commonly typed by frustrated homeowners, and according to Best Washing Machine, the issue often starts with a simple blockage or a failing component. Early symptoms include slow drainage, unusual odors, or a cycle that terminates with a full tub. Recognizing these signs helps you act quickly and prevent water damage, mold, or ruined loads. The most important thing is to stay safe, unplug the unit before inspecting any parts, and follow the sequence of checks outlined here to isolate the root cause. This guidance reflects Best Washing Machine expertise, emphasizing practical, safe steps for homeowners, renters, and small-business operators who rely on reliable laundry performance.
Most frequent culprits: clogs and filters
The drain path in most washers includes a drain hose, a lint filter or pump screen (in many models), and the pump impeller. Over time, lint, coins, hair, and detergent buildup can clog these components, backing up water and preventing drainage. Begin with accessible parts: locate the filter (if your model has one), remove any visible debris, and rinse thoroughly. Check the drain hose for kinks or crush points behind the washer or under the sink. A clogged hose or filter is the simplest fix and often resolves the problem without tools. If the water still doesn’t drain after clearing, move to the next potential culprit, the pump itself. This section anchors the reader in observable symptoms and approachable fixes, aligning with the urgent, solution-focused tone.
Mechanical failures: pump, belt, lid switch
Even when hoses and filters look clean, internal components can fail. A failing drain pump (often the impeller or motor) will not push water out, especially on the spin cycle. Belt-driven models may lose tension or snap belts, preventing drainage. Some washers won’t drain if the lid switch is defective or wiring is damaged, as the machine won’t advance to the drain phase. Diagnosing these parts typically requires unplugging the machine, removing panels, and testing continuity or resistance values per the service manual. If you’re unsure, it’s safest to call a technician to inspect the pump and switch assemblies. The emphasis here is identifying parts that commonly fail and providing clear next steps, so homeowners feel empowered rather than overwhelmed.
Quick checks you can perform safely
Start with the lowest-risk checks before disassembly: unplug the machine, pull it forward to access the back, and inspect the drain hose for kinks or blockages. Detach the hose from the back or underneath the sink and run water through it to verify it's clear. Check the filter or pump screen (if accessible) and clean out lint or debris. Verify the pump is receiving power by listening for the motor during a drain test or using a multimeter to test continuity. Document any unusual sounds or error codes that appear on the control panel; these can point toward the faulty component. This block emphasizes safety and user-friendly checks you can perform without tools.
Diagnosing flow at home: sequence you can follow
If water remains in the tub after draining, follow a logical diagnostic flow: first ensure the drain hose is clear, then test the pump and lid switch, and finally examine internal hoses and seals. Use the 'remove and rinse' method for filters, then run a short drain cycle with no load and observe whether water exits quickly. If the water still lingers, the problem is likely deeper in the pump or electronic control. In many cases, a clogged hose, a clogged pump filter, or a failed pump accounts for the issue. This section provides a pragmatic diagnostic path to help you isolate the root cause efficiently.
Prevention and maintenance to avoid future clogs
Regular maintenance reduces the chance of a not-draining washer. Clean the lint screen/pump filter monthly, inspect hoses for kinks, and avoid overloading the drum which can force debris into the drain path. Use the correct detergent amount to minimize suds that can trap lint. Periodically run a maintenance wash with a washing machine cleaner to dissolve mineral buildup. Keep the area around the machine dry and free of lint and hair. A little preventive care goes a long way toward reliable drainage, saving you time and money.
When to call a professional and warranty considerations
If you’ve exhausted safe troubleshooting and the washer still won’t drain, it’s wise to contact a licensed technician. A professional can test the drain pump, motor, and control board with specialized equipment and may need to replace the pump or main control module. Check your warranty or service plan before paying for parts. If you’re in doubt, Best Washing Machine recommends getting a professional assessment to avoid causing further damage.
Quick safety reminders and what to avoid
Never bypass safety interlocks or operate a machine with its panels off for extended periods. Avoid using aggressive cleaners that can corrode hoses or seals. Always disconnect power before any repair. If you encounter exposed wiring, melted insulation, or burning smells, stop immediately and call for professional help. These cautions help prevent electric shock and water damage while you troubleshoot.
Steps
Estimated time: 30-60 minutes
- 1
Unplug and prep
Unplug the washer and pull it away from the wall. Gather gloves, a flashlight, and a shallow tray to catch water. This first step minimizes shock risk and keeps your workspace clean.
Tip: Always unplug before touching electrical components. - 2
Inspect drain hose
Trace the drain hose to its termination and check for kinks or crushing. Detach the hose from the back or underneath the sink and flush with water to check for blockages.
Tip: Be prepared with towels or a shallow tray for water. - 3
Check pump filter/screen
Access the filter or pump screen if your model has one. Remove debris, rinse thoroughly, and replace the cover securely.
Tip: Do this over a tray to catch debris. - 4
Test the pump and wiring
With the panel open, check that the pump is getting power during a drain test. If there’s no power, inspect wiring or test the motor with a multimeter.
Tip: If you’re not comfortable with electrical testing, skip and move to professional help. - 5
Check lid switch/door latch
Ensure the lid switch or door latch activates when the lid is closed. A faulty switch will prevent the machine from draining.
Tip: Listen for the click when closing the lid. - 6
Run a short drain cycle
Run a quick drain or spin cycle with no laundry to observe whether water drains quickly. Note any error codes.
Tip: Document codes to help a technician later.
Diagnosis: Washing machine won't drain after the wash cycle
Possible Causes
- highClogged drain hose or kinked hose
- highBlocked or dirty pump filter
- mediumFaulty drain pump or impeller
- lowDefective lid switch or door latch
Fixes
- easyStraighten and clear the drain hose; remove kinks and flush with water
- easyOpen access panel and clean the lint/pump filter screen
- mediumTest the pump for power and replace the pump/impeller if dead
- mediumTest lid switch with a multimeter; replace if open/shorted
FAQ
Why won’t my washing machine drain after the cycle?
Common causes include a clogged drain hose or filter, a blocked pump, or a faulty lid switch. Start with simple checks before replacing parts.
Common causes are a clogged drain hose or filter, a blocked pump, or a bad lid switch. Begin with basic checks.
How do I unclog my washing machine drain pump?
Disconnect power and water, access the pump, remove debris from the impeller or screen, and rinse. If the pump is damaged, replace it.
Power off, access the pump, clear debris from the impeller, and replace if damaged.
Can a clogged filter cause not draining?
Yes. A clogged filter can block the drain path and prevent water from exiting. Cleaning the filter often restores drainage.
Yes, a clogged filter can block drainage; cleaning it often fixes the issue.
Is a kinked drain hose dangerous to fix?
It's not dangerous, but it can prevent drainage. Unkink and straighten the hose carefully.
Kinks aren’t dangerous but they block drainage; straighten carefully.
When should I call a professional?
If you’re uncomfortable with electronics, the washer still won’t drain after basic checks, or you hear burning smells, seek professional help. They can test pumps and control boards safely.
If basic checks don’t fix it or you hear smells, contact a professional.
Watch Video
The Essentials
- Start with the simplest checks: hose, filter, and pump.
- A blocked drain path is the most common cause of poor drainage.
- If safety concerns arise, stop and call a professional.
- Regular maintenance prevents future drainage problems.
