Jura Not Working? Complete Troubleshooting Guide (E6, E8, S8, Z10, GIGA 6)

How a Jura Tells You What's Wrong

A Jura that stops working usually tells you why in words. The E6, E8, S8, Z6, Z10 and GIGA 6 show plain messages such as "Fill water tank", "Empty drip tray" or "Clean", and each one clears when you do what it says. The only numbered errors JURA explains are Error 2 and Error 5, which mean the machine got too cold. Any other "Error" is a call to JURA customer support.

Two things you won't find in any of these manuals: a brewing unit for owners to remove and rinse, and meanings for Error 8 or other numbers. The manuals say there are no user-serviceable parts and that repairs are for authorized personnel. So Jura troubleshooting is mostly about messages, grind, maintenance programs and the milk system, which is how this guide is organized.

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Quick Fix Finder

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Problem 1: Jura Won't Turn On

Every model in this guide has one power control, the On/Off button, and no owner reset or fuse. A dark machine is almost always the socket, plug or power cord, or a machine that switched itself off after its set idle time. The full checklist, including the cold-machine errors, is in the Jura won't turn on guide.

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Problem 2: Error Codes and Display Messages

Common Jura Display Alerts

These come from the display-message tables in the E6, E8, S8, Z6, Z10 and GIGA 6 manuals. Most stop drinks until you deal with them.

Two message faults have documented fixes. If "Fill water tank" doesn't appear with an empty tank (E6, Z6, Z10), there's limescale in the tank. If it appears with a full tank (S8), the float is trapped. Both are fixed by descaling the water tank: 3 JURA descaling tablets in a full tank, left for several hours, then rinsed.

Service Errors (Require Jura Support)

• Error 2 or Error 5: after a long time in the cold, heating may be disabled for safety. Warm the machine to room temperature.
• Any other "Error" message: switch the machine off and contact JURA customer support. The manuals give no meaning for any other number, Error 8 included.
• Grinder making a very loud noise: foreign objects in the grinder. Contact customer support.

JURA's US customer service is 1-800-220-5701 (info@us.jura.com), and Canada's is 1-855-544-8600.

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Problem 3: Machine Grinds but Produces No Coffee

No dedicated guide on this site is checked against the manuals for this yet, so here are the manuals' own rows.

Step 1: Coarsen the Grind

"Coffee only comes out in drips" is in every manual, and the first cause is coffee ground so finely it blocks the system. On the E8, open the cover behind the bean container, turn the grinder adjustment switch coarser and close the cover. Other models' manuals show where their grinder setting is. On the Z10, the grind is set per drink: open the drink's product settings (touch and hold it for about 2 seconds) and set it 1-2 levels coarser.

Step 2: Check Ground Coffee Use

If you use the ground-coffee funnel, JURA's rules are: no more than two level measuring spoons, a grind that isn't too fine, and the drink started within about a minute of adding the coffee. With too little coffee the machine stops and shows "Not enough ground coffee" (Z6, Z10, GIGA 6). Never put instant coffee or chocolate in the funnel.

Step 3: Descale if the Water Hardness Was Wrong

The second cause of drip-only coffee is a water hardness setting that doesn't match your water, which lets scale build up. Run descaling (Problem 6), then set the correct hardness using the Aquadur test strip.

A grinder making a very loud noise is the exception. That's foreign objects in the grinder, and a job for JURA support.

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Problem 4: Weak Coffee or Low Output Volume

Weak coffee is usually a setting, not a fault. On the E8, you can change a single drink's strength by pressing the up or down button while it grinds, and its amount while it brews. To make the change permanent, touch and hold the drink for about 2 seconds and use "Product settings" for strength, amount and temperature. On the Z10, grind is a per-drink setting too.

If you see dry ground coffee behind the grounds container, your beans are producing more grounds than average. The manual's fix is a lower coffee strength or a finer grind.

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Problem 5: Milk System Not Frothing or Blocked

Poor foam or milk spraying out of the frother or dual spout means it's dirty. Run "Clean the milk system" with JURA milk system cleaner, then take the frother apart and rinse it if needed. On the Z6, Z10 and GIGA 6, also check the dual spout's cover is fitted and try a lower milk temperature. Little or no steam with a very quiet pump means the connector is blocked. The steps for both are in the Jura maintenance guide.

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Problem 6: Descale Alert Won't Clear After Descaling

Why It Happens

The Jura prompts for descaling when scale builds up, based on the water hardness you set. The manuals give two conditions for a clean result: use only original JURA descaling tablets, and let the program run to the end. JURA warns that interrupting descaling may damage the machine, and that other agents, vinegar included, can damage it or leave residues.

Correct Procedure to Clear the Alert

1. Start "Descale" from the maintenance menu and empty the drip tray and grounds container.
2. Dissolve 3 JURA descaling tablets in 17 oz (500 ml) of water (E6, E8, S8, Z6) or 20 oz (600 ml) (Z10, GIGA 6), and pour the solution into the empty tank.
3. Put receptacles under the hot-water nozzle and the milk spout. Empty them and the tray whenever the display asks, and refill the rinsed tank with fresh water when told.
4. Let it finish: about 40 minutes (E6, E8, GIGA 6) or 45 minutes (S8, Z6, Z10).
5. If it stopped unexpectedly, rinse the water tank thoroughly.

A CLEARYL Smart filter removes the need to descale, because the machine stops prompting once one is fitted.

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Model-Specific Notes

The E6, E8, S8, Z6, Z10 and GIGA 6 prompt for the cleaning program after 180 preparations or 80 switch-on rinses. The ENA 8 asks after 160 preparations or 80 rinses. It takes about 20 minutes with one JURA cleaning tablet. The GIGA 6 has two bean containers, so its "Fill bean container" message names the left or right one.

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When to Call Jura Service

• Any "Error" other than 2 or 5, or Error 2/5 still showing once the machine is warm.
• A very loud grinder.
• Water under the machine with the tray empty and no program running.
• A smell of burning or visible damage. Unplug immediately.

The manuals say not to remove service covers and that repairs must be done by authorized personnel.

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FAQ

Can I use third-party descaling tablets in my Jura?

JURA says no. The manuals call for original JURA descaling tablets, and warn that other agents, vinegar included, may damage the machine or leave residue.

My Jura keeps asking me to empty the grounds container, but it's already empty. Why?

It was probably emptied with the machine switched off. JURA says to always empty the grounds container with the machine on, because that's the only way to reset the grounds counter.

How often should I clean the Jura brew unit?

You don't clean it by hand. None of these manuals describes removing the brewing unit. JURA's cleaning program does that job, and the machine asks for it after 180 preparations or 80 switch-on rinses.

Is it safe to leave a Jura on all day?

It switches itself off after the idle time you set: 15 or 30 minutes, or 1 to 9 hours on the E6, E8 and Z10. Each switch-on runs a rinse, so put a cup under the spout when you wake it.

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Related Jura Guides

• Jura won't turn on
• Jura leaking water
• Jura maintenance and cleaning guide
• Jura Z10 problems and messages
• Jura J10 error messages
• Jura ENA 8 not working
• Jura descaling guide

Sources: JURA Instructions for Use for the E6 (NAC), E8 (NAC), S8, Z6, Z10 (NAA), GIGA 6 and ENA 8 (NAC), US editions.