Applies to: automatic machines (E6, E8, ENA, S8, J8, Z10, GIGA).
How to fix Fill water tank (tank is full)
- Remove the tank, check the float in its channel moves freely, and descale the tank in a bowl of descaler.
- Reseat the tank firmly; the valve at the base must open.
- Fit a fresh filter correctly, or remove it, and try again.
- If the message persists with a clean float and full tank, contact Jura support; the sensor inside the machine is not an owner repair. Jura-parts.com notes that some newer models have no float, and that a separate "Fill System" message points to a clogged micro screen or a grind that is too fine.
When to stop and call a repairer
Nothing dangerous here.
What it costs
| Parts | Not published by Jura. |
|---|---|
| Service | Service prices are not published by the manufacturer. Ask an authorised service centre, and an independent espresso repairer, for a quote. |
| Worth repairing? | Yes. |
Beyond the fix
Tips and tricks
- A technician suggests empty the tank, poke a straightened paper clip into the hole at the top of the float, and tip the tank up and down until the float moves freely.technician video
- Clear debris from the tank outlet where the red gasket sits. Another technician says dirt blocks water passing into the machine.technician video
- Descale the tank itself: Jura's E8 manual dissolves 3 descaling tablets in a full tank for several hours or overnight, then rinse.manufacturer manual
Common mistakes
- Topping up again and again. The float, not the water level, is usually what the machine is reading.
- Using vinegar to descale. Jura's Z10 and E6 manuals warn against it.
Easily confused with
- Fill System is a separate message. Jura-parts.com ties it to grinding too fine, which soaks the grounds.
- The Z10 manual describes the reverse case, where the message does not show though the tank is empty.
Further reading
Questions
What does Fill water tank (tank is full) mean on the Jura?
Water tank message will not clear although the tank is full. The machine reads the water level through a magnet float in the tank and a sensor in the machine. Scale on the float, a float stuck at the bottom, or a tank not seated on its valve gives a false empty reading.
Can I fix Fill water tank (tank is full) myself?
DIY difficulty: easy. Remove the tank, check the float in its channel moves freely, and descale the tank in a bowl of descaler. Reseat the tank firmly; the valve at the base must open.
How much does it cost to fix Fill water tank (tank is full)?
Not published by Jura. Service prices are not published by the manufacturer. Ask an authorised service centre, and an independent espresso repairer, for a quote.
Is it worth repairing?
Yes.
Fill water tank (tank is full) during startup or during use?
Juras report Fill water tank (tank is full) any. That timing is a useful clue when narrowing the cause.
Can I keep using the machine with Fill water tank (tank is full) showing?
Generally yes — Fill water tank (tank is full) is more of an annoyance than an emergency. Fix it when convenient; just do not let the cause sit for months.
Will Fill water tank (tank is full) clear on its own?
Often, yes. The first step (remove the tank, check the float in its channel moves freely, and descale the tank in a bowl of descaler) clears a share of cases on its own. If the code comes straight back, the part is genuinely at fault.
How long does the repair take?
Fifteen to thirty minutes with basic tools, once you have the part.