Ice maker runs but produces no ice at all.

Safety first: Disconnect power and close the water supply valve before removing panels or water lines.

Steps:

• Confirm power and mode: Ensure the Manitowoc unit is switched to ICE mode (not CLEAN or OFF) and that the bin is not full.
• Check water supply: Verify the building shutoff valve is open. Remove the water line at the machine and briefly open the valve into a bucket to confirm strong flow.
• Replace water filter: If a filter is installed, replace the cartridge and purge air per manufacturer instructions.
• Observe operation: Restore power and water. Watch for fill, freeze, and harvest. If the compressor and condenser fan never start, suspect the control board or safety lockout. If they run but no frost forms on the evaporator, a sealed system issue is likely.

When to call a technician: If basic water and power checks are good but there is still no ice, a Manitowoc‑qualified technician should test the compressor, hot gas valve, and refrigerant charge.