Contents
High Efficiency Washer Smells Like Sewer: Causes and Solutions
Have you noticed a foul smell coming from your high efficiency washer lately? This can be a common issue for many homeowners, and it can be quite frustrating. The cause of the smell is often due to a buildup of bacteria and mold inside the machine, which can result in a strong sewer-like odor.
Fortunately, there are steps you can take to eliminate the smell and get your washer back to working properly. In this article, we’ll discuss the common causes of the problem and provide some solutions to help you restore your washer’s freshness.
Some of the causes of a high efficiency washer smelling like sewer include using too much detergent, using only cold water, and a build-up of lint and other debris. Additionally, if your washer is not draining properly, it can lead to standing water and a buildup of bacteria.
To solve the issue, try using less detergent and using hot water instead of cold. You can also clean the interior of the machine with a mixture of baking soda and vinegar, and regularly clean the lint filter. If the problem persists, it may be necessary to call a professional to have the washer inspected.
Overall, a high efficiency washer smelling like sewer can be a nuisance, but with the right approach, it can be resolved quickly and easily. By being mindful of your washing habits and regularly cleaning the machine, you can keep unpleasant odors at bay and ensure that your washer is working efficiently.
What Causes Your High Efficiency Washer to Smell Like Sewer?
Having a high-efficiency washer is great for saving water and energy, but it can sometimes lead to unpleasant odors. One common issue homeowners face with their HE washer is a sewage smell. If you’re experiencing this, here are some potential causes:
- Trapped Water: If your washer has standing water in it, it can lead to mold and mildew buildup, which causes the distinct sewer smell.
- Faulty Drainage System: A malfunctioning or clogged drainage system can cause wastewater to back up into your washer after a cycle, leading to the sewage odor.
- Dirty Wash Cycle: If the washer isn’t getting cleaned properly, dirt and grime can build up over time, leading to foul smells.
How Can You Fix the Problem?
Luckily, there are several things you can do to eliminate the sewage odor coming from your washer:
- Run a hot water cycle: Running your washer on hot with no clothes and a cup of white vinegar can help get rid of any bacterial buildup causing the smell.
- Clean the washer: Use a washer cleaner or a mixture of bleach and water to clean the inside of your washer thoroughly.
- Check the drainage system: Make sure the drain hose is properly installed and not clogged.
- Use the right detergent: Avoid using too much detergent and never use regular soap, which can build up and cause foul smells.
- Maintain the washer: Leave the washer door open after each use to allow moisture to evaporate and regularly clean the detergent dispenser, door seal, and drum bin.
Preventing the Sewage Smell in the Future
Now that you’ve eliminated the smell, it’s essential to take preventative measures to ensure it doesn’t happen again in the future:
- Regularly clean the washer as needed
- Use the right amount of detergent
- Keep the area surrounding the washer clean and dry
By taking these preventative measures, you can keep your high efficiency washer smelling fresh and clean.
Final Thoughts
A sewer smell coming from your high efficiency washer can be unpleasant and frustrating. However, with a little time and effort, you can eliminate the smell and prevent it from happening in the future. Following the tips outlined above will help you keep your washer running smoothly and smelling fresh for years to come.

Top Reasons for High Efficiency Washer Smells Like Sewer
1. Clogs in Drainage System
One of the common reasons why high efficiency washers smell like sewer is due to clogs present in the drainage system. The clog blocks the flow of water and causes a backup that results in the sewer-like smell.
2. Buildup of Dirt and Debris
The buildup of dirt and debris in the washer drum, hoses, and pipes can also lead to the washing machine producing a sewer-like smell. It is important to regularly clean the washer drum and all its components to prevent buildup.
3. Faulty Ventilation System
Another cause of sewer-like smell emanating from a high efficiency washer could be a faulty ventilation system. The ventilation system helps to remove any moisture from the washer, and if it is not working properly, it can cause a buildup of moisture and musty smells that resemble sewerage.
4. Use of Too Much Detergent
Another reason for the foul smell might be the use of excess detergent beyond what the washing machine requires. The excess soap does not allow the washer to rinse out properly, causing it to smell like a sewer.
Conclusion
High efficiency washers can sometimes emit a sewer-like smell due to various reasons, including clogs in the drainage system, buildup of dirt and debris, faulty ventilation system, and excessive use of detergent. It’s vital to understand the primary causes of this issue to prevent it from happening and ensure your washing machine operates efficiently.
Learn more about washing machine types on Wikipedia

Frequently Asked Questions About High Efficiency Washer
Why Does My High Efficiency Washer Smell Like Sewer?
If your high efficiency washer smells like sewer, it could be due to several reasons. One of the most common reasons is that there is a buildup of detergent, dirt, and other debris in the washer’s hoses and pipes. This can cause a foul odor to emanate from the washer.
Another reason your washer may smell like sewer is that the P-trap or drain may be clogged. The P-trap is a U-shaped pipe under the sink that prevents sewer gases from getting into your home. If it becomes clogged, it can cause those unpleasant smells to come back up into your washer.
You can also check if your washer’s drain hose is properly installed. If it’s too far down the drain pipe, the water could get trapped and stagnant, causing bad odors.
What Are Some Ways to Prevent My High Efficiency Washer From Smelling Like Sewer?
To prevent your high efficiency washer from smelling like sewer, you should regularly clean your washer’s hoses and pipes. You can do this by running your washer with hot water and vinegar or bleach.
You should also regularly clean the washer’s drum and door gasket with a solution of baking soda and water. Make sure to follow the manufacturer’s instructions for cleaning.
In addition, you should always use the recommended amount of detergent and avoid using too much, as this can cause a buildup of residue that can lead to bad odors.

High Efficiency Washer Smells Like Sewer:
Possible Causes:
- Dirty Drain Hose
- Clogged Vent Stack
- Buildup of Soap Scum and Dirt
- Mold or Bacteria Growth
Solutions:
- Clean Drain Hose with a mixture of vinegar and hot water
- Clear Vent Stack of any debris or obstructions
- Run a cleaning cycle with bleach or specialized washing machine cleaner
- Regular cleaning of the washer, including wiping down the door seal and inside drum
Prevention:
- Use HE detergent to prevent excessive soap buildup
- Leave door open between washes to allow for proper ventilation and drying
- Clean the washer at least once a month, more often if needed





























