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There are a few possible reasons why a brand new dishwasher might have an unpleasant odor, even after being cleaned before use:

  1. Residual manufacturing odors: Sometimes, new appliances can have lingering odors from the manufacturing process. These odors can come from adhesives, coatings, or other materials used during production. While most manufacturers take steps to minimize these odors, they may still be present initially.

  2. Shipping and storage: Dishwashers can spend a significant amount of time in transit and storage before reaching the customer. During this time, they may be exposed to varying temperatures and humidity levels, which can create a favorable environment for the growth of bacteria or mold. This can lead to unpleasant odors even if the dishwasher was cleaned before use.

  3. Plumbing issues: Occasionally, the odor may not be specific to the dishwasher itself but rather related to the plumbing connected to it. If there is a problem with the drain line or if the dishwasher is not properly connected to the plumbing system, it can lead to odors from the sink or drain getting trapped in the dishwasher.

To address these issues, you can try the following steps:

  1. Run an empty hot water cycle: Fill the dishwasher with hot water and run a cycle without any dishes or detergent. This can help flush out any residual odors from manufacturing or storage.

  2. Clean the dishwasher filter and interior: Remove the dishwasher filter and clean it thoroughly according to the manufacturer's instructions. Also, wipe down the interior of the dishwasher, including the walls, racks, and door seals, using a mixture of warm water and mild dish soap.

  3. Check the drain line and connections: Ensure that the dishwasher's drain line is properly connected and not kinked or clogged. Also, make sure the drain line is connected to a proper plumbing system that is functioning correctly.

  4. Use a dishwasher cleaner: Consider using a dishwasher cleaner specifically designed to eliminate odors and remove any build-up inside the dishwasher. Follow the instructions on the cleaner for best results.

If the odor persists despite these efforts, it may be helpful to contact the manufacturer's customer support for further assistance, as they may have specific recommendations or be able to address any underlying issues.

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