Washer Smells Like Sewer

Quick answer

A washer smelling like sewer gas is usually due to a drain issue or buildup. Check the drain hose and pump for clogs. Ensure the drain line is properly vented. If the problem persists, inspect the sewer line for blockages.

Confirm the symptom

• Your washer emits a strong sewer-like odor.
• The smell is noticeable when the washer is running or after a cycle.
• You notice the odor near the washer's drain hose or pump.
• The smell is not present in other areas of your home.

Tools and prep

• Turn off the washer and unplug it from the power source.
• Locate the water shutoff valve and turn off the water supply.
• Gather gloves, a flashlight, a screwdriver, and a bucket.
• Have a wet/dry vacuum or plumber's snake ready for clogs.
• Clear the area around the washer for easy access.

Step-by-step troubleshooting

1. Inspect the Drain Hose
   Do: Locate the drain hose at the back of the washer.
   Observe: Check for any visible clogs or blockages.
   Means: The hose is clear.
   Next: Proceed to the next step.
2. Check the Pump
   Do: Access the pump, usually located at the bottom front of the washer.
   Observe: Look for any debris or clogs in the pump.
   Means: The pump is clear.
   Next: Move on to inspecting the drain line.
3. Inspect the Drain Line
   Do: Trace the drain line from the washer to the wall.
   Observe: Ensure the line is properly vented and not kinked.
   Means: The drain line is clear and properly vented.
   Next: Check for sewer line blockages.
4. Check for Sewer Line Blockages
   Do: Inspect the sewer line for any signs of blockages.
   Observe: Look for slow drains or gurgling sounds in other plumbing fixtures.
   Means: The sewer line is clear.
   Next: Clean the washer with a specialized cleaner.
5. Clean the Washer
   Do: Run a cleaning cycle with a washer cleaner or vinegar.
   Observe: Follow the cleaner's instructions for the best results.
   Means: The washer is clean.
   Next: Reassemble and test the washer.
6. Reassemble and Test
   Do: Reassemble any parts you removed and restore power and water.
   Observe: Run a test cycle to see if the odor persists.
   Means: The odor is gone.
   Next: No further action needed.
7. Check for Leaks
   Do: Inspect the washer for any leaks around the hose connections.
   Observe: Ensure all connections are tight and secure.
   Means: No leaks are present.
   Next: Proceed to the next step.
8. Inspect the Drain Filter
   Do: Locate and clean the drain filter, usually at the front bottom of the washer.
   Observe: Remove any debris or clogs from the filter.
   Means: The filter is clean.
   Next: Reassemble and test the washer.

Common causes

Parts matching

These parts are commonly associated with a washer smelling like sewer gas.

• Drain hose
• Washing machine pump
• Drain line
• Drain filter
• Washer cleaner
• Hose connectors

Always ensure you have the correct replacement parts for your specific washer model.

When to call a professional

• The odor persists after trying all troubleshooting steps.
• You suspect a main sewer line blockage.
• You are uncomfortable performing any of the steps yourself.
• The washer shows signs of significant damage or leaks.

FAQ

Related guides

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