Most people assume their washing machine stays clean because it is constantly filled with water and detergent.
In reality, that moist environment, combined with detergent residue, lint, body oils, and dirt, creates the perfect conditions for buildup behind the drum and inside the drainage system.
If your washer is:
- Leaving water in the drum
- Draining slowly
- Making your clothes smell musty
A proper clean and manual drain is often the first step before the issue develops into a more serious fault.
In many service cases, drainage issues are caused by a buildup affecting the filter, pump, or internal hoses, rather than a major component failure.
Before You Start
Before draining or cleaning the machine, check a few common causes:
- The filter may already be blocked
- The drain hose could be kinked or restricted
- The machine may be overloaded, affecting drainage
These quick checks can sometimes resolve the issue without further steps.
Why Cleaning and Draining Your Washing Machine Actually Matters
This is not just about hygiene.
Inside most washing machines, a thin layer of residue, often called biofilm, forms over time.
That buildup can:
- Trap bacteria and odour-causing particles
- Restrict water flow through hoses and filters
- Interfere with pressure sensors
- Put extra strain on the drain pump
In real repair scenarios, many drainage faults start as minor buildup that was not cleaned early.
How Often Should You Clean or Drain Your Washing Machine?
Recommended frequency depends on usage and manufacturer guidelines:
- General households: Once a month or every 30 wash cycles
- Heavy use (daily loads): Every 2 to 3 weeks
- Light use: Every 6 to 8 weeks
Filter cleaning: Every 4 to 6 weeks or when you notice slow draining
Manual draining: Only when needed such as standing water, slow draining, or odours
If you live in areas with mineral-heavy water, buildup can form faster and may require more frequent cleaning
Signs Your Washing Machine Needs Cleaning or Draining Now
Do not rely only on a schedule. Watch for these warning signs:
- Musty or sour smells
- Clothes not smelling clean after washing
- Slow or incomplete draining
- Visible residue or mould around the door seal
- Unusual drain noises or error codes
Quick Tool Checklist
| Tool | Why You Need It |
| Bucket or shallow container | Catch draining water |
| Towels | Prevent spills as machines can hold residual water |
| Screwdriver or pliers | Access panels if needed |
| Soft brush or toothbrush | Clean residue and buildup |
| Plumber’s snake (optional) | Clear deeper clogs |
Use a plumber’s snake carefully. Forcing it too far can damage internal hoses.
Easy Monthly Clean (No Full Drain Needed)
- Run a hot empty cycle
- Add white vinegar (1 to 2 cups) or a washing machine cleaner
- Run a second cycle with baking soda in a separate cycle if needed
- Clean the door gasket, drum, and detergent drawer
- Leave the door open to dry
While vinegar is commonly used, some manufacturers advise against frequent use as it may affect rubber seals over time. For regular maintenance, a dedicated washing machine cleaner is often the safer long-term option.
How to Drain Your Washing Machine Properly
1. Turn Off Power
Unplug the machine completely before starting.
Do not rely on the power button alone. Disconnecting from power reduces the risk of electrical hazards, especially when working near water.
2. Prepare the Area
Before opening anything, place:
- Towels under the machine
- A shallow container or tray in front
Even a partially drained washing machine can still hold several litres of water, which can spill quickly once the filter is opened.
3. Locate the Drain Access
- Front loaders: a small panel at the bottom front of the machine
- Top loaders: rear drain hose connected to a standpipe or sink
Open the panel carefully. Inside, you will usually find:
- A round filter cap
- A small emergency drain hose (on most front loaders)
4. Use the Emergency Drain Hose First
This is one of the most important steps.
Pull out the small drain hose and remove the cap slowly.
Let the water flow into your container.
You may need to:
- Empty the container multiple times
- Pause and re-cap the hose between drains
This step prevents a sudden release of water when removing the main filter.
5. Remove and Clean the Filter
Once the water has been drained:
- Slowly unscrew the filter cap
- Be prepared for a small amount of remaining water
- Remove any debris such as lint, coins, hair, or residue
Rinse the filter under warm water and gently scrub if needed.
Before reinstalling, check inside the filter housing for any hidden debris.
6. Check the Drain Hose and Flow
Inspect the main drain hose for:
- Kinks
- Blockages
- Restricted water flow
If possible, run a small amount of water through it or check if it drains freely.
If draining is still slow after cleaning:
- The blockage may be deeper inside the system
- Or the issue may involve the pump or internal hoses
7. Reassemble and Test the Machine
Secure the filter tightly and return the drain hose to its position.
Plug the machine back in and run a short rinse or spin cycle to confirm:
- Water drains properly
- No leaks are present
Why Regular Cleaning Prevents Bigger Repairs
Washing machines rely on a balanced system made up of the pump, sensors, and internal drainage pathways working together.
When buildup forms inside the machine, it does not stay isolated in one area. It gradually affects how the entire system operates.
Detergent residue, lint, and debris can begin to restrict water flow through the drain pathways. As this happens, the drain pump needs to work harder to push water out of the system.
Over time, this added strain can lead to:
- Premature wear on the drain pump
- Reduced drainage efficiency
- Inconsistent cycle performance
At the same time, sensors that monitor water levels, such as the pressure switch, may begin to misread conditions when residue or blockages interfere with normal operation.
This can result in:
- The machine not draining at the correct time
- Cycles stopping unexpectedly
- Overfilling or underfilling
In service scenarios, these types of faults often begin as minor maintenance issues that were left unresolved.
What starts as a simple buildup inside the filter or hose can gradually develop into a mechanical fault that requires parts replacement or more complex repair.
Regular cleaning helps maintain proper water flow, reduces strain on internal components, and allows the machine to operate as intended.
When Cleaning Is Not Enough
If you have cleaned and drained your washer but still notice:
- Water not draining
- Recurring error codes
- Loud draining noises
- Repeated blockages
The issue is likely within the internal drainage system rather than surface-level buildup.
Common causes include:
- Faulty drain pump
- Blocked sump hose
- Pressure switch malfunction
- Control board faults
If your machine is showing error codes such as drain or pump errors, refer to your model manual. These often indicate specific internal faults.
At this stage, further DIY attempts can sometimes cause additional damage, especially when accessing internal components.
If the issue continues after basic checks, it is usually more efficient to have the machine properly diagnosed. Our licensed technician can identify the exact cause before it develops into a more complex repair.
Conclusion
Cleaning your washing machine regularly helps maintain performance and prevent common issues.
However, it does not resolve every fault.
If drainage problems continue after cleaning, it usually indicates an underlying issue within the pump, sensors, or internal hose system that requires proper diagnosis.
Addressing these issues early can help prevent a minor fault from developing into a more complex repair.
If your machine continues to show error codes or fails to drain after completing these steps, arranging a professional assessment is often the most practical next step.
At Quality Appliance Repairs, we diagnose the root cause—whether it’s a faulty pump or a sensor malfunction—to get your laundry back on track.
Book Your Diagnostic Service Online
Frequently Asked Questions
Why is my washing machine not draining even after cleaning the filter?
If your washing machine is still not draining after cleaning the filter, the issue is likely deeper in the system. Common causes include a blocked sump hose, a failing drain pump, or a pressure switch that is not detecting water levels correctly. These faults are not visible during basic cleaning and usually require proper inspection.
How often should you drain your washing machine manually?
Manual draining is not required on a strict schedule. It is usually only needed when you notice standing water, slow drainage, or a blockage. For general maintenance, cleaning the machine monthly and checking the filter every 4 to 6 weeks is typically sufficient for most households.
Can a blocked drain pump damage the washing machine?
Yes. When the drain pump is blocked or restricted, it has to work harder to remove water. Over time, this can lead to overheating, reduced performance, or complete pump failure. Addressing blockages early helps prevent more expensive repairs.
Is it safe to fix a washing machine drainage issue yourself?
Basic steps such as cleaning the filter, checking hoses, and running cleaning cycles are generally safe. However, accessing internal components like the pump or electrical parts involves water and electrical systems. If the issue goes beyond simple cleaning, it is safer to have the machine inspected professionally.
How much does it cost to fix a washing machine that is not draining in Australia?
Repair costs depend on the cause of the issue. Minor problems such as clearing a blockage may only involve a service call, while replacing a drain pump or internal component can increase the cost depending on the brand and parts required. For accurate pricing, the appliance needs to be assessed based on its make and model.
Is it worth repairing a washing machine that won’t drain?
In many cases, yes. Drainage issues are often caused by replaceable components such as pumps or hoses, which can be repaired at a lower cost than replacing the entire machine. The decision usually depends on the age of the appliance, its overall condition, and the cost of the repair compared to replacement.
You can read more about whether it’s worth repairing your washing machine depending on its age and condition.
