If your washing machine smells like sewage, it can be both unpleasant and concerning. This issue is more common than you might think and is usually caused by bacteria buildup, trapped water, or plumbing-related problems.
The smell often becomes stronger after a wash cycle or when the machine has not been used for a while. Ignoring it can make the problem worse over time.
The good news is that in most cases, this issue can be fixed easily without professional help.
What Causes a Washing Machine to Smell Like Sewage?
Understanding the cause is the first step toward fixing the problem.
1. Bacteria and Mold Buildup
Moisture inside the washing machine creates the perfect environment for bacteria and mold.
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Rubber seals
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Detergent drawer
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Drum
These areas trap water and develop a bad smell over time.
If your home also has a damp odor, check this guide on why your house smells musty.
2. Clogged Drain Hose
The drain hose can become blocked with lint, detergent residue, and dirt. This prevents proper drainage and causes water to sit inside the system.
That stagnant water produces a sewage-like smell.
3. Dirty Filter
Many washing machines have a filter that traps debris. If it is not cleaned regularly, it becomes a source of bad odors.
4. Plumbing Issues
Sometimes the smell is not coming from the machine itself, but from your drain system.
If you suspect a drainage issue, read this detailed guide on why your drain smells bad.
5. Using Too Much Detergent
Excess detergent does not fully rinse out and leaves residue inside the machine. Over time, this creates bacteria buildup and bad smells.
How to Fix Washing Machine Smell
You can solve this problem with simple steps.
Method 1: Run a Hot Cleaning Cycle
Run an empty cycle with hot water and:
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White vinegar
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Baking soda
This helps kill bacteria and remove buildup.
Method 2: Clean the Rubber Seal
Wipe the rubber seal around the door carefully.
This area often hides mold and dirt.
Method 3: Clean the Detergent Drawer
Remove the drawer and wash it thoroughly.
Dry it before placing it back.
Method 4: Check and Clean the Filter
Locate the filter (usually at the bottom front).
Remove debris and rinse it.
Method 5: Leave the Door Open
After each wash, leave the door slightly open to allow airflow and prevent moisture buildup.
If you notice similar smells in your sink, you may also want to read why your sink smells like sewage.
When Should You Call a Professional?
If the smell continues after cleaning:
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The drain may be blocked
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There could be a plumbing issue
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The machine may need servicing
How to Prevent Washing Machine Smells
Prevention is simple:
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Use the correct amount of detergent
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Clean the machine monthly
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Leave the door open after use
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Check the filter regularly
Final Thoughts
If your washing machine smells like sewage, the cause is usually bacteria, trapped water, or drainage issues.
With regular maintenance and proper cleaning, you can eliminate the smell and keep your machine fresh and efficient.
