How to Get Rid of a Bad Smell from Your Washer (When the Washer Isn’t the Problem)
We often hear the same story from customers who call us about a bad smell in their laundry room.
They are convinced it’s coming from the washing machine.
The smell is familiar — sour, musty, unpleasant.
Exactly the kind of odor most people associate with a dirty washer.
In many cases, the washer turns out to be completely innocent.
What Most Homeowners Try First
When customers describe the issue, they usually tell us they’ve already tried everything they could find online.
- Cleaning the rubber door gasket
- Running hot cleaning cycles
- Using vinegar or baking soda
- Leaving the washer door open between washes
- Checking the drain hose
Sometimes the smell improves briefly — then comes back.
That’s usually when people assume something inside the washer is failing.
Since the washing machine sits right there in the laundry room, it feels like the obvious cause.
The Real Source of the Smell (A Common Surprise)
In a large number of cases, the smell has nothing to do with the washing machine at all.
What we often find instead is a rarely used laundry sink or floor drain in the same room.
On the surface, everything looks fine.
The issue is underneath.
When a sink or drain isn’t used regularly, the water inside the drain trap can slowly evaporate.
Once that happens, sewer gases have a clear path into the laundry room.
Because the washer is nearby, the odor gets blamed on the appliance — even though it’s coming from the plumbing.
The Fix Is Often Very Simple
In many of these situations, the solution is as simple as running water in the laundry sink for a few seconds.
This refills the drain trap, blocks the sewer gases again, and the smell disappears almost immediately.
Customers are often surprised by how fast the issue is resolved — especially after weeks or months of frustration.
Why This Happens
Every sink, tub, and floor drain in a home has a drain trap.
That trap holds water, which acts as a seal to prevent sewer gases from entering the living space.
If the drain isn’t used for a long time, the water can evaporate.
Once the trap dries out, odors can travel freely into the room.
Laundry rooms are especially prone to this because:
- Utility sinks are often used infrequently
- Floor drains may be overlooked
- The washing machine is nearby and gets blamed first
Why the Washer Almost Always Gets the Blame
Washing machines can develop odors, so the assumption feels reasonable.
Sewer gas from a dry drain trap often smells musty or sour rather than distinctly like sewage.
That makes it easy to confuse with a washer-related odor.
By the time someone calls us, they are usually convinced the washer is the problem — even though it isn’t.
When the Smell Really Is Coming from the Washer
Of course, there are situations where the washing machine itself is the source of the odor.
Common causes include:
- Mold buildup in the door gasket
- Standing water inside the drum
- Machines that are rarely used
- Drain pump or internal hose issues
The key is ruling out the simple plumbing causes before assuming the appliance needs repair.
Before You Clean or Repair Your Washer, Check This First
If you’re searching for how to get rid of a bad smell from your washer, we recommend checking this first:
- Run water in the laundry sink for 10–15 seconds
- Pour water into any floor drains in the room
- Give it a few hours and see if the smell returns
This quick check can save you unnecessary cleaning, part replacement, or service calls.
Final Thought
Many laundry room odor issues turn out not to be appliance problems at all.
Sometimes the washing machine is simply nearby when a plumbing issue shows up.
Identifying the real source makes the solution far simpler — and far less frustrating.
If the smell persists after ruling out drains and sinks, that’s when it makes sense to look deeper into the appliance itself.