Check the water inlet valve:
The water inlet valve requires a minimum of 20 psi to shut off properly. If the water pressure is too low, the valve may not close fully once the power is shut off. As a result, the valve will leak water into the ice maker and cause the ice maker to overflow. Check the water pressure to determine if it is at least 20 psi. If the water pressure is sufficient, the water inlet valve is likely defective. The valve may not shut off all the way or may be stuck open, causing water to leak through the valve. If the water pressure is sufficient, but the ice maker is still overflowing, replace the water inlet valve.
If that isn't the problem, you may need to replace the ice maker.
For repair, call Sears Home Services at 1-800-4-MY-HOME.
You can find parts here: searspartsdirect.com/model/5cqk0oo01m-001268/amana-tr25s5l-p1196402wl-top-mount-refrigerator-parts