Household crescent ice makers usually gravity-fill from a valve. Water pump replacement matters more on recirculating undercounter ice makers and on commercial cube machines used around Village at Leesburg restaurants and office break rooms. The pump moves water over an evaporator plate. When it fails, you get silence, a hum with no ice, or a burned-out motor.
Scale from Leesburg water shortens pump life. A contractor may clean the reservoir and check the dump valve in the same visit. Recurring pump failures on a dirty machine are a maintenance problem, not just a part problem.
Residential recirculating units
Some U-Line, Marvel-style, and luxury undercounter makers in River Creek wet bars use a pump. If you hear the pump but ice never forms, the issue may be refrigerant or a dirty condenser - not only the pump. Diagnosis first.