How to Fix / Troubleshooting

Safety first: Unplug the unit before handling water components.

Check reservoir outlet: Remove the Tristar water tank and inspect the outlet valve and any mesh filter. Clean under running water with a soft brush.
Descale aggressively: Fill the tank with descaler solution and run repeated brew cycles (without coffee) until some flow is restored, then flush with clean water.
Listen to the pump: During a brew attempt, listen for a buzzing or clicking sound from the base. If silent, the pump may not be receiving power or is failed.
Inspect hoses (advanced): Remove the back/bottom cover and check silicone hoses for kinks, blockages, or disconnections. Replace any hardened or collapsed hoses.

Note: If descaling and hose checks do not restore flow, the vibration pump likely needs replacement.

Coffee maker lights up and makes noise, but no water flows and no coffee is dispensed.

Possible Causes