The u201 error code is a Nintendo Switch error code that indicates that the console was unable to connect to the internet. There can be several reasons why this error code appears, including but not limited to: the Nintendo Switch console not being connected to the internet, the router not being properly configured, or the DNS settings on the console not being set up correctly.
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- Replace the door gasket.
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- Clean the door seal.
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- Replace the door seal.
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- Adjust the door.
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- Clean the drain hose.
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- Check the drain pump.
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- Replace the drain pump.
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- Run a cycle without detergent to clean the dishwasher.
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- Clean the filters.
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- Descale the dishwasher.