Ice maker does not power on at all; no lights or display when plugged in.

Safety first: Ensure the outlet is properly grounded. Unplug the unit before opening any panels.

Steps to diagnose no power:

• Check outlet: Plug another appliance or a lamp into the same outlet to confirm it has power. Reset any tripped breaker or GFCI.
• Inspect power cord: Examine the cord for cuts, kinks, or burn marks. If damaged, replace the power cord set rather than attempting to repair it.
• Check power switch: On models with a mechanical switch, ensure it clicks firmly. Access the switch from inside the control panel and test continuity with a multimeter. Replace if open when switched on.
• Inspect internal fuse: Some Costway models include a small fuse on the main control board. Remove the cover, locate the fuse, and test it with a multimeter. Replace with the same rating if blown.
• Control board replacement: If power reaches the board but there is still no display or response, the main control board is likely defective and should be replaced.