Ice maker area excessively frosted; Liebherr display shows F9 and ice production stops

Safety first: Unplug the appliance before accessing internal components. Be cautious of sharp metal edges.

• Visual inspection: Remove the ice bin and any covers to inspect the ice maker area. Look for heavy frost or ice buildup around the tray, fill tube, and surrounding ducting.
• Manual defrost: If there is heavy ice, turn off the appliance and leave the freezer door open for several hours to melt the ice. Use towels to catch water. Do not chip ice with tools.
• Check door seals: Ensure the freezer door gasket is sealing all around. Air leaks can cause excessive frost and overload the ice maker defrost system.
• Test after defrost: Restore power and monitor ice production. If frost quickly returns and F9 reappears, the ice maker defrost heater circuit is likely open and requires electrical testing with a multimeter and replacement of the heater or ice maker assembly by a technician.