Display shows E15 and the machine indicates a leak or internal water error; sometimes water is found in the base.

Safety first: Unplug the coffee maker immediately if you suspect an internal leak. Water and electricity are a dangerous combination.

Steps:

• Empty external drip tray: Remove and empty the drip tray and used capsule container. Clean and dry them thoroughly.
• Check for external leaks: Inspect around the water tank, base, and front panel for visible water.
• Access base pan (advanced): Remove the bottom cover to inspect the internal base. Many Tefal models have a float or sensor that detects water here.
• Dry the interior: If water is present, soak it up with paper towels and allow the machine to air dry for 24 hours in a warm, dry place.
• Identify leak source: Examine hoses, clamps, and fittings around the pump, boiler, and brew head for signs of dripping or mineral trails. Tighten loose clamps and replace cracked hoses.
• Reassemble and test: After ensuring everything is dry and secure, reassemble and test with the machine placed on a dry paper towel to detect any new leaks. If E15 returns or leaks persist, professional service is recommended.