Jura Z10 Problems & Error Codes: Complete Fix Guide

The Z10 Shows Messages, Not Error Codes

A Jura Z10 explains most problems in plain words on its touchscreen: "Fill water tank", "Empty drip tray", "Spout is not fitted". It clears them as soon as you do what they ask. The only numbered errors its manual explains are Error 2 and Error 5, which mean the machine got too cold and heating was switched off for safety. Let it warm to room temperature. For any other "Error" message, JURA's instruction is to switch the Z10 off and contact customer support.

The Z10 (JURA type 759; US article 15464 in Diamond Black) has a touchscreen, a Rotary Switch, a dual spout that serves coffee and milk, and a separate hot-water spout. Its grind is set per drink in the product settings. That matters when coffee only drips, because the manual's first fix is to make that one drink's grind coarser.

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Z10 Messages and What to Do

From the display-message and troubleshooting tables in the Z10 (NAA) Instructions for Use:

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Fix 1: Clear the Water Tank Message (Works About 25% of the Time)

The Z10 knows the tank is empty and refuses to brew. If the message doesn't match reality, the manual gives one cause: when "Fill water tank" fails to appear with an empty tank, there's a lot of limescale in the tank.

Signs it's this one: "Fill water tank" is showing, or it doesn't show although the tank is empty.

1. Fill the tank with fresh, cold water and push it fully back in.
2. If the message doesn't come on when the tank is empty, descale the tank. Remove the CLEARYL filter, fill the tank completely and dissolve 3 JURA descaling tablets in it.
3. Leave it for several hours, overnight for example, then empty and rinse it thoroughly.
4. Refit the filter and refill with fresh, cold water.

Time: 2 minutes (overnight for a tank descale)
Cost: Free, or 3 JURA descaling tablets
Success Rate: About 25%
Difficulty: Easy

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Fix 2: Empty the Grounds Container With the Machine On (Works About 20% of the Time)

"Empty coffee grounds container" comes back too soon when the container was emptied with the Z10 switched off. The manual is explicit: always empty it with the machine switched on, because "this is the only way of resetting the coffee grounds counter". The Z10's container holds a maximum of 20 portions.

Signs it's this one: the message returns after only a few drinks, or right after you emptied the container.

1. With the Z10 switched on, pull out the drip tray and grounds container.
2. Empty and rinse both. The manual's maintenance table lists them as dishwasher-safe.
3. Refit them fully. If "Drip tray not fitted" appears, push the tray in until it seats.
4. If you find dry grounds behind the grounds container, your beans are producing more grounds than average. Lower the coffee strength or choose a finer grind in that drink's settings.

Time: 3 minutes
Cost: Free
Success Rate: About 20%
Difficulty: Easy

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Fix 3: Fit and Clean the Dual Spout (Works About 20% of the Time)

The dual spout causes three different Z10 complaints: the "Spout is not fitted" message, poor milk foam or milk spraying, and little or no steam with a very quiet pump.

Signs it's this one: a spout message, sputtering or spraying milk, or weak steam from the milk side.

1. "Spout is not fitted": fit the dual spout's cover correctly.
2. Poor foam or spraying: make sure the cover is on, then run "Clean the milk system" with JURA milk system cleaner. If it persists, take the dual spout apart and rinse it. Also try a lower milk and milk foam temperature for that drink.
3. Little or no steam, very quiet pump: the connector may be blocked by milk residue or by limescale loosened during descaling. Press the releasing devices and pull the cover up and off. Remove the milk system and unscrew the black connector using the hexagonal hole in the measuring spoon. Clean it thoroughly and screw it back on by hand, then tighten it by no more than a quarter turn with the spoon.

Time: 5-15 minutes
Cost: JURA milk system cleaner
Success Rate: About 20%
Difficulty: Easy

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Fix 4: Coarsen the Grind When Coffee Only Drips (Works About 15% of the Time)

Coffee that only drips means the system is blocked by coffee ground too finely, or scale if the water hardness setting was wrong. Because the Z10 grinds per drink, the fix is usually in that drink's settings, not a global dial.

Signs it's this one: one drink, often a strong or short one with a finer grind, comes out drop by drop.

1. Touch and hold the drink for about 2 seconds to open its product settings.
2. Set its consistency of grind 1 to 2 levels coarser, as the manual suggests.
3. If you used ground coffee through the filler funnel, use a coarser grind.
4. If drips continue across all drinks, check the water hardness setting and descale when the machine asks. Without a CLEARYL filter, 3 JURA descaling tablets go in 20 oz (600 ml) of water, and the program takes about 45 minutes.

Time: 5 minutes (45 minutes to descale)
Cost: Free
Success Rate: About 15%
Difficulty: Easy

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Fix 5: Warm Up a Cold Z10 (Error 2 or Error 5) (Works About 10% of the Time)

Error 2 and Error 5 are the only numbered errors the Z10 manual explains. After a long time in the cold, the Z10 disables heating for safety.

Signs it's this one: the Z10 was delivered, stored or moved somewhere cold, and now shows Error 2 or Error 5.

1. Switch it off and let it reach room temperature.
2. Switch it on and let it heat and rinse.
3. If the error returns once it's warm, contact JURA.
4. Before moving or storing it in the cold again, use "Empty system" in the settings. The manual describes it as frost protection.

Time: A few hours of waiting
Cost: Free
Success Rate: About 10%
Difficulty: Easy

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Fix 6: Call JURA for Any Other Error (Works About 10% of the Time)

Every other numbered "Error" is for JURA's customer support. The manual gives no owner meaning or reset for them, and says to switch the Z10 off with the On/Off button and contact support. The same applies if the grinder makes a very loud noise, which the manual puts down to foreign objects in the grinder.

1. Note the exact error text on the display.
2. Switch the Z10 off with the On/Off button.
3. Contact JURA customer support: 1-800-220-5701 (info@us.jura.com) in the US, or 1-855-544-8600 in Canada.

Time: A phone call
Cost: Depends on warranty and service
Success Rate: About 10%
Difficulty: Service job

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When DIY Won't Work

• Any error other than 2 or 5, or Error 2/5 returning once the machine is warm.
• A very loud grinder. Don't reach into it.
• A smell of burning or visible damage. Unplug it immediately and contact JURA customer service.
• Water under the machine with the tray empty. See the Jura leaking guide.

JURA's manual says not to remove service covers, that there are no user-serviceable parts, and that repairs must be done by authorized personnel.

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Preventing Z10 Problems

• Empty the grounds container and drip tray daily, with the machine switched on.
• Clean the milk system daily when you've made milk drinks, and keep the dual spout's cover fitted.
• Run programs when asked. Cleaning comes after 180 preparations or 80 switch-on rinses and takes about 20 minutes. With a CLEARYL filter fitted, the Z10 won't ask for descaling.
• Use only fresh, cold water. The manual rules out mineral and carbonated water.
• Run "Empty system" before cold transport or storage.

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FAQ

Does the Jura Z10 have error codes?

Mostly no. It shows plain-text messages. The only numbered errors its manual explains are Error 2 and Error 5, for a machine that got too cold. Any other "Error" means switch off and contact JURA customer support.

Why does my Z10 say "Spout is not fitted"?

The cover of the dual spout isn't on correctly. Fit it until it seats. The same missing cover is also one cause of milk spraying from the spout.

Can I use regular descaling powder or vinegar in my Z10?

No. The manual says to use only original JURA descaling tablets. It warns that other agents, vinegar included, may damage the machine or leave residue. A CLEARYL Smart filter removes the need to descale at all.

How many coffees before the grounds container needs emptying?

It holds a maximum of 20 portions, and the Z10 counts them. Empty it with the machine switched on so the counter resets. Otherwise the message comes back early.

What does the Z10's rinse at switch-on do?

It rinses the coffee system, and it counts toward the cleaning prompt (after 80 switch-on rinses). At switch-off, the Z10 rinses only if a coffee was made. Put a cup under the dual spout for both.

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Related Jura Guides

• Jura leaking water
• Jura won't turn on
• Jura maintenance and cleaning guide
• Jura descaling guide
• Jura complete troubleshooting guide

Sources: JURA Z10 (NAA) Instructions for Use, US edition (J74945, 2023); us.jura.com Z10 support page.