Display shows E8 and the machine makes a loud buzzing noise but no coffee is dispensed.

Safety first: Unplug the coffee maker before handling water connections.

• Refill and reseat tank: Fill the Tristar reservoir to the MAX line and push it firmly into place until it clicks or sits flush.
• Clear inlet valve: Inspect the bottom of the tank for a spring-loaded valve. Press it gently with a blunt object under running water to ensure it opens freely and is not clogged.
• Prime the system: Plug the unit back in. Start a brew cycle without coffee and, if your model allows, open the hot water/steam outlet briefly to help purge air. Repeat 2–3 times.
• Check for leaks (advanced): Remove the back cover and inspect the silicone intake hose from the tank connection to the pump. Tighten any hose clamps and replace cracked hoses.

Note: If E8 persists and the pump runs but no water moves, the pump or internal intake valve may need replacement.