When a technician finds that an ice machine's condenser water circuit has a thin layer of mineral deposits, the technician should do what?

Flushing the water circuit with a scale remover is the appropriate action to take when a technician discovers mineral deposits in an ice machine's condenser water circuit. Mineral buildup can hinder the efficient operation of the condenser by reducing heat transfer efficiency, leading to potential overworking of the compressor and decreased cooling performance.

Using a scale remover helps to dissolve and remove these deposits, promoting better water flow and improved heat exchange within the condenser. This preventative maintenance action not only restores functionality but also extends the lifespan of the equipment by preventing more severe issues that could arise from neglecting the buildup.

In contrast, replacing the condenser would not address the underlying problem of mineral deposits and would be an unnecessary and costly solution. Increasing the refrigerant flow could create additional complications without resolving the mineral issue. Changing the water supply may not be feasible or effective in managing existing deposits and could introduce further problems without addressing the current situation. Therefore, flushing with a scale remover is the most effective and economical choice to maintain the system's efficiency.