Whether a dishwasher requires salt depends on the specific model and type of dishwasher you have. Not all dishwashers need salt, but some models, especially those with built-in water softeners, do require dishwasher salt. The confusion might arise from the fact that not all regions or households have hard water, which is when dishwasher salt becomes more important.
Here's some clarification:
Hard water and dishwasher salt: Hard water contains high levels of minerals like calcium and magnesium. When hard water is used in a dishwasher, it can lead to mineral deposits and limescale buildup on dishes and inside the dishwasher. Dishwasher salt is used to regenerate the ion-exchange resin in water softeners, which helps reduce the hardness of the water used in the dishwasher.
Built-in water softeners: Some dishwashers have a built-in water softener that requires dishwasher salt to function correctly. These dishwashers have a light or indicator that turns on when the salt level is low, signaling that it needs to be refilled.
Salt-free dishwashers: On the other hand, some dishwashers do not have water softeners and, therefore, do not require dishwasher salt. If you have a water softener system for your entire house, you might not need to add salt separately to the dishwasher.
To know for sure whether your dishwasher needs salt or not, you should consult the user manual that came with the dishwasher. The manual will provide specific instructions on maintenance and if you need to add dishwasher salt. Additionally, you can contact the manufacturer or check the dishwasher's model number online to find more information about its features and requirements.
If the machine's indicator light is saying that salt is needed, it's best to follow that guidance and add dishwasher salt according to the manufacturer's instructions to ensure the dishwasher functions optimally and to prevent any potential issues caused by hard water deposits. If you're unsure or have any concerns, don't hesitate to reach out to the dishwasher manufacturer or a qualified technician for assistance.