Coffee maker stops mid-brew and displays E03; water remains in the reservoir and very little coffee is dispensed.

Safety: Unplug the unit and let it cool before handling internal parts.

• 1. Descale the system:
  • Fill the water reservoir with a 1:1 mixture of white vinegar and water.
  • Run a brew cycle without coffee grounds. If the unit stops again, let it sit 20 minutes, then restart.
  • Repeat until the full reservoir has cycled through, then run 2–3 full reservoirs of clean water to rinse.
• 2. Clean the inlet screen:
  • Remove the water reservoir and inspect the base where it seats on the coffee maker.
  • Use a soft brush or toothbrush to clean any mesh screen or inlet port of debris or coffee grounds.
• 3. Inspect internal tubing and one-way valve:
  • Remove the top cover to access silicone water lines and the one-way valve near the heater.
  • Check for kinks, mineral buildup, or blockages. Soak removable silicone tubing in warm vinegar solution, then flush with water.
  • If the one-way valve is stuck or clogged, replace the valve assembly.
• 4. Evaluate the water pump:
  • Locate the small vibration or rotary pump (depending on model) connected to the reservoir outlet.
  • Check electrical connections and test pump resistance with a multimeter (compare to service specs if available).
  • If the pump hums but does not move water even after cleaning lines, replace the water pump.
• 5. Reassemble and test:
  • Reinstall all tubing and covers securely to prevent leaks.
  • Run multiple water-only cycles to confirm normal flow and that E03 no longer appears.