In this guide
TL;DR: A plumbed standalone ice maker that backs up needs its drain arrangement checked before another cleaning cycle. Identify gravity drainage or a drain pump, then match the installed hose and route to that model. Cleaner cannot correct a blocked, damaged or unsuitable drain.
The drain type changes what needs checking
KitchenAid's drain-types guidance separates gravity systems from pump-equipped installations. Its gravity arrangement uses a floor drain below the machine without low points that hold water. A pump serves a different installation, and some models already include one.
Find the model number and installation record before assuming a pump is missing or broken. Match hose length, lift and the permitted outlet to that exact appliance and pump.
Document the visible route without pulling the machine out
Look only at exposed portions you can see from a safe, dry position. Note a kink, flattened hose, displaced outlet or the location of water collecting. KitchenAid's not-draining checks identify the correct hose and alignment over the drain. Send the model number and photographs to the installer or service provider.
Leave hidden tubing, panels and the pump assembled. KitchenAid's W11686966A manual warns that a twisted drain hose can prevent operation and gives specific drain-connection requirements to prevent backup. Do not detach a line or improvise a sealed connection to test it.
If water is rising or leaking, stop ice production and arrange help. Stay clear of wet electrical connections. Hands-on service requires electrical disconnection by the matching procedure; do not reach behind a wet machine to unplug it.
A cleaner cycle still needs a working drain
GOHALL Ice Machine Cleaner Tablets address mineral deposits and everyday buildup in compatible standalone machines. They do not clear plumbing obstructions, repair a pump or establish that an installation is suitable.
Leave chemical treatment until the drainage problem is resolved and the machine can complete its approved procedure. Do not keep adding water or cleaner to force a rinse. The compatibility and rinsing guide covers manufacturer permission, complete draining and fresh-water rinses. Refrigerator and freezer ice makers are excluded. If cleaning solution is already trapped, ask the manufacturer how to finish safely before producing or serving ice.
A question about drainage and power
Can a drain problem also interrupt the ice maker's power?
KitchenAid says an incorrect drain hose can cause low or no production and no or intermittent power. That possibility does not diagnose a failed pump. Have the installation and electrical symptoms assessed together instead of bypassing the pump or repeatedly restarting the appliance.