Error 05 shows up right after a water tank runs dry, or after a fresh water filter is installed with air still trapped inside. It looks alarming, but it's not a pump failure — it just needs the circuit purged.

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01Official fix

  1. Switch the machine OFF.
  2. Empty the water tank and remove the AquaClean filter (or any other water filter) if installed.
  3. Refill the tank with fresh water and reinsert it (without the filter for now).
  4. Switch the machine back on and let it fully heat up.
  5. Select hot water and dispense 2-3 cups to purge trapped air from the circuit.

02If you use an AquaClean filter

Follow these extra steps to prepare the filter properly before reinstalling it:

  1. Shake the AquaClean filter for 5 seconds.
  2. Hold it upside down in a container of water until no more air bubbles escape.
  3. Place the prepared filter back into the water tank and refill with water.
  4. Restart the machine (switch off, then back on).
  5. Select hot water and dispense 2-3 cups.
The pattern to remember Error 05 is almost always triggered by one specific event — a dry tank, a new filter, or the tank being removed and refilled. If you can identify which of these just happened, the purge process above resolves it in a couple of minutes.