What is a likely effect of scale buildup from hard water in appliances?

The presence of scale buildup due to hard water can significantly impact the performance and longevity of appliances that use water, such as dishwashers, water heaters, and coffee makers. When minerals like calcium and magnesium precipitate out of hard water, they create a thick layer of scale on the heating elements and internal surfaces of these appliances.

This scale buildup acts as an insulating barrier, making it more difficult for appliances to transfer heat efficiently. As a result, they require more energy to achieve the same heating effect, leading to decreased operational efficiency. Over time, this increased workload can cause appliances to wear out more quickly, resulting in higher maintenance costs as they may need repairs or replacements sooner than expected.

Thus, the correct answer accurately reflects the negative implications of scale buildup in terms of appliance efficiency and maintenance expenses. The other options suggest improvements or benefits, which contradict the widely recognized issues associated with scale in hard water scenarios.