Refrigerator displays E15 and may shut down certain functions; often associated with internal leak detection on some models.

Safety: Disconnect power and close the water supply valve before inspecting for leaks.

Steps:

• 1. Pull out the appliance: Carefully move the refrigerator away from the wall. Look underneath for signs of water in the base tray.
• 2. Inspect base tray and float switch: Some Gaggenau models have a float switch in the base that triggers E15 when water accumulates. If accessible, remove the lower front or rear kick panel and check for standing water.
• 3. Remove water: Sponge or vacuum out any water from the tray. Allow the area to dry completely.
• 4. Identify leak source: Check the defrost drain outlet, water inlet valve, internal water lines, and drain pan for cracks or loose connections. Look for dried mineral trails indicating slow leaks.
• 5. Repair leak: Tighten fittings, replace cracked tubing, or clear blocked defrost drains as needed (see separate defrost drain entry for details).
• 6. Reset error: After drying and fixing the leak, restore power. If E15 returns and water reappears, further diagnosis by a technician is recommended.