A failing compressor, bad condenser fan motor or faulty drain pump can cause loud noise from the ice maker. If the compressor is making a loud noise, a service technician should repair the ice maker because a compressor repair involves the recovery and recharge of the refrigerant, which is tightly regulated by the Environmental Protection Agency (EPA). If the condenser fan motor is making noise, unplug the ice maker and replace the condenser fan. If the drain pump is noisy, unplug the ice maker and clear any debris you find in the drain pump. If the drain pump is clear, then you'll likely need to replace the pump because the motor is failing.
The recirculation pump can be noisy if water level in the reservoir is low. A problem with the water supply or a failed inlet water valve can cause this problem. If water level in the reservoir is low, check the water supply. Unplug the ice maker and shut off the water supply cut-off valve. Disconnect the water supply line from the ice maker and place the end of the water supply line in a container. Briefly open the water supply cut-off valve and check for water flow from the end of the water supply line. If no water flows through the end of the supply line, have a plumber fix the water supply going to the ice maker. If water does flow through the supply line, you'll likely need to replace the water inlet valve because it's not opening to allow water to flow into the reservoir.
If the recirculation pump is noisy and the reservoir is full, you'll likely need to replace the recirculation pump because its motor is failing or its impeller is damaged.