Why Does My New Dishwasher Smell Like Sewage

Have you recently installed a brand-new dishwasher only to find an unpleasant sewage-like smell emanating from it? It can be quite perplexing and frustrating to deal with such an issue, especially when you expect your new appliance to function flawlessly. However, there are several reasons why a new dishwasher might develop an unpleasant odor that resembles sewage. In this article, we will delve into the root causes of this problem and provide you with effective solutions to eliminate the smell and keep your dishwasher smelling fresh.

Understanding the Problem: Why Does a New Dishwasher Smell Like Sewage?

To tackle this issue, it’s essential to understand the underlying reasons behind the unpleasant odor. Bacteria and biofilm play a significant role in creating an environment conducive to the development of foul smells in dishwashers. When your dishwasher is not cleaned regularly or maintained properly, these microscopic organisms can thrive and produce a sewage-like odor. Additionally, there are several common causes that can contribute to the unpleasant smell in your new dishwasher.

Solutions to Eliminate the Smell

  1. Proper cleaning and maintenance: Regular cleaning is crucial to prevent the buildup of bacteria and biofilm in your dishwasher. Make sure to clean the interior walls, door gasket, and spray arms using a soft brush and mild detergent. Pay attention to the filter, as it can accumulate food particles and debris over time.
  2. Use of vinegar and baking soda: Vinegar and baking soda are natural cleaning agents that can help eliminate odors. Place a cup of white vinegar on the top rack of your dishwasher and run a hot water cycle. Follow this up by sprinkling baking soda on the bottom of the dishwasher and running another cycle. These ingredients will help neutralize the odors and remove any residue.
  3. Checking the drain hose and garbage disposal connection: The drain hose and garbage disposal connection can sometimes become clogged, leading to stagnant water and foul odors. Ensure that these components are clear of any obstructions or debris. You can use a pipe cleaner or a small brush to remove any buildup.
  4. Inspecting the air gap and filter: The air gap, usually located on the sink countertop or the top of the dishwasher, prevents the backflow of water from the drain. Clean the air gap by removing the cover and using a brush to remove any debris. Additionally, check the dishwasher’s filter and clean or replace it if necessary.

Preventive Measures to Keep the Dishwasher Smelling Fresh

Taking preventive measures can help you avoid future unpleasant smells in your dishwasher. Here are some tips to keep your dishwasher smelling fresh:

  1. Scrape and rinse dishes before loading: Removing excess food particles from your dishes before placing them in the dishwasher will prevent debris from accumulating and causing odors.
  2. Run regular cleaning cycles: Set your dishwasher to run a cleaning cycle with hot water and no dishes. This practice will help remove any residue or bacteria buildup, keeping your dishwasher clean and fresh.
  3. Use dishwasher-safe cleaning agents: When cleaning your dishwasher, make sure to use cleaning agents specifically designed for dishwashers. Avoid using harsh chemicals that can damage the appliance or leave residue behind.
  4. Avoid using too much detergent: Using excessive detergent can lead to oversudsing, which can contribute to foul smells. Follow the manufacturer’s instructions for detergent usage and avoid overloading the dishwasher.
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Why does my brand new dishwasher smell so bad?

It’s possible that your dishwasher is giving off a foul smell due to bacteria growth. Bacteria can grow in the moist environment of a dishwasher, especially if it hasn’t been used for a while. To get rid of the smell, you should first clean out the inside of the dishwasher with an all-purpose cleaner and a sponge. Make sure to pay special attention to any crevices or hard-to-reach areas where bacteria may be hiding. After cleaning, run an empty cycle with hot water and some white vinegar to help eliminate odors. Finally, leave the door open after use so that air can circulate and dry out any remaining moisture. Following these steps should help keep your dishwasher smelling fresh and clean!

How do you get rid of sewer smell in dishwasher?

Getting rid of a sewer smell in your dishwasher can be a challenging task. Fortunately, there are several steps you can take to get rid of the smell and keep your dishwasher smelling fresh.

The first step is to clean out any food particles or debris that may have accumulated in the dishwasher. To do this, remove all dishes and run an empty cycle with hot water and soap. This will help to dislodge any stubborn particles that may be stuck in the filter or other areas of the dishwasher.

Once you’ve cleaned out the dishwasher, it’s important to take preventative measures to ensure that the smell doesn’t return. Start by running a cycle with vinegar instead of soap – this will help to kill any bacteria or mold that could be causing the smell. Additionally, make sure to leave the door open after each use so that air can circulate and prevent moisture from getting trapped inside.

Why does my brand new dishwasher smell like rotten eggs?

The smell of rotten eggs coming from your brand new dishwasher could be a sign of a few different issues. First, it could be caused by a buildup of bacteria in the dishwasher. Bacteria can form in the dishwasher’s pipes and filters, and this can cause an unpleasant odor. To fix this issue, you should clean out the dishwasher with a mild detergent or vinegar solution.

Another possible cause of the smell is that there may be food particles stuck inside the dishwasher. Food particles can easily get stuck in the filter or other parts of the machine, and this can lead to an unpleasant smell. To remove these food particles, you should run an empty cycle with a bit of vinegar or baking soda added to it. This will help loosen up any stuck-on particles and remove any odors they may be causing.

Finally, if neither of these solutions work, it’s possible that there is something wrong with your dishwasher itself.

Why does my Bosch dishwasher smell like sewage?

A foul smell coming from your Bosch dishwasher is likely caused by a buildup of food debris or other organic matter in the drain filter. The drain filter should be cleaned out regularly to prevent odors from occurring. Additionally, check the water supply line for any blockages that may be causing the smell. If the water supply line is clear, then it may be necessary to clean out the drain hose and pump assembly, which can become clogged with food particles over time. Finally, if the dishwasher still smells bad after cleaning out all of these components, then you may need to replace certain parts such as the sump or seal gasket.

How often should I clean my dishwasher?

It is recommended to clean your dishwasher at least once a month to prevent the buildup of bacteria and foul odors. However, if you notice any unusual smells or residue, it is advisable to clean it more frequently.

Can I use bleach to eliminate the smell?

While bleach may seem like a potent cleaning agent, it is not recommended for regular dishwasher cleaning. Bleach can damage the dishwasher’s components and may leave behind harmful residue. Stick to mild detergents or natural cleaning agents like vinegar and baking soda.

What should I do if the odor persists after cleaning?

If the smell persists even after thorough cleaning, it is recommended to consult the dishwasher’s manufacturer or a professional technician. Persistent odors could indicate an underlying issue that requires specialized attention.

Is it normal for a new dishwasher to have a smell?

It is not uncommon for a new dishwasher to have a slight odor initially. This can be attributed to the appliance’s components, such as hoses and filters, settling in and adjusting. However, if the smell becomes strong and unpleasant, it is essential to investigate and address the issue.

Can a dishwasher smell affect the cleanliness of my dishes?

Yes, a dishwasher smell can potentially impact the cleanliness of your dishes. Foul odors may indicate the presence of bacteria or residue, which can transfer onto your dishes during the washing cycle. It is important to resolve the smell issue to ensure hygienic dishwashing results.


In conclusion, a new dishwasher smelling like sewage can be attributed to bacteria, biofilm, and various common causes. Regular cleaning and maintenance, the use of vinegar and baking soda, checking the drain hose and garbage disposal connection, and inspecting the air gap and filter can help eliminate the unpleasant odor. Additionally, adopting preventive measures such as scraping and rinsing dishes, running regular cleaning cycles, using dishwasher-safe cleaning agents, and avoiding excessive detergent usage can keep your dishwasher smelling fresh and functioning optimally.

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