Jura Not Heating Water? 5 Fixes That Work

When a Jura Coffee Comes Out Lukewarm

JURA's first answer to cool coffee is the cup. Every manual read recommends prewarming cups, because "a cold porcelain cup cools the beverage". The second is a setting: each coffee product has its own temperature, and on the S8 and Z6 it's low, normal or high. A product saved at "low" brews every cup cooler. Check both before suspecting the heater.

If the machine won't heat at all and shows Error 2 or Error 5, it isn't broken either. It was exposed to cold for a long time, and heating is disabled for safety until it warms to room temperature.

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Try This First

• Pour hot water into the cup first, tip it out, then brew. Compare the temperature.
• Check the product's temperature setting. Hold the product button (E6, E8) or open its product settings (S8, Z6).
• Milk drinks only? The milk temperature is a separate setting.
• Read the display. Error 2 or 5 means cold; any other Error means call JURA.

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What Your Symptom Points To

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Fix 1: Prewarm the Cup (Works About 35% of the Time)

A thick porcelain cup at room temperature pulls heat straight out of a short espresso. JURA's advice is the same in the E6, E8, S8 and Z6 manuals: prewarm the cups. The S8 manual adds that "the full coffee aroma can develop only in prewarmed cups".

1. Run a little hot water into the cup, or fill it from a kettle.
2. Leave it for a few seconds, then tip it out.
3. Brew straight away.
4. JURA also sells a cup warmer for this.

Time: 30 seconds
Cost: Free
Success Rate: About 35%
Difficulty: Easy

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Fix 2: Raise the Product's Temperature (Works About 30% of the Time)

Jura stores a temperature with each product, so one drink can run cooler than the rest if its setting was lowered.

1. E6 and E8: press and hold the product button for about two seconds, open Product settings, and change Temperature. Save it.
2. S8: in the product settings, choose low, normal or high.
3. Z6: in Product settings / Expert mode, set the coffee's temperature to low, normal or high.
4. Make the drink again and compare.

Time: 2 minutes
Cost: Free
Success Rate: About 30%
Difficulty: Easy

Double products (two espressos at once) use the same temperature as the single product.

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Fix 3: Raise the Milk Temperature (Works About 15% of the Time)

On milk drinks, the coffee may be hot but the milk sets the drink's temperature. JURA also notes that milk should go in cold, at 39-46°F (4-8°C), for good foam.

1. Z6: the milk and milk foam temperature has ten levels, from 1 (low) to 10 (high). It applies to every milk drink.
2. S8 and E8: check the temperature in the product settings of the milk drink.
3. Make the drink in a prewarmed glass or cup.

Time: 2 minutes
Cost: Free
Success Rate: About 15%
Difficulty: Easy

On the Z6, a milk temperature set too high is one of the manual's causes of milk spraying from the dual spout. Raise it a level at a time.

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Fix 4: Warm a Cold Machine (Error 2 or Error 5) (Works About 10% of the Time)

If a Jura has been in a cold car, garage or delivery van, it may refuse to heat. The manual's row is the same for every model: Error 2 or Error 5 means "heating may be disabled for safety reasons".

1. Bring the machine indoors.
2. Leave it until it has reached room temperature.
3. Switch it on again.
4. If the error returns at room temperature, contact JURA.

Time: Until it reaches room temperature
Cost: Free
Success Rate: About 10%
Difficulty: Easy

Any other Error number has no published meaning. Switch off and call JURA.

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Fix 5: Wake It From Automatic Switch-Off (Works About 10% of the Time)

A Jura that seems cold and dead may simply have switched itself off. The E6, E8 and Z10 can switch off 15 minutes, 30 minutes or 1-9 hours after the last action, and the S8 and Z6 have a "Switch off after" setting too.

1. Press the On/Off button.
2. Let it heat and run its switch-on rinse into a cup.
3. Make the drink.
4. If it switches off too soon for you, lengthen the switch-off time in the settings.

Time: About a minute
Cost: Free
Success Rate: About 10%
Difficulty: Easy

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Model Notes

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When to Call JURA

• Error 2 or Error 5 comes back at room temperature
• Any other Error message
• A smell of burning, or visible damage: unplug at once

The manuals describe no heater, thermostat or thermoblock that owners can test or replace, and say "NO user serviceable parts" are inside. JURA USA: 1-800-220-5701 · Canada: 1-855-544-8600.

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Keep Coffee Hot

• Prewarm cups every time.
• Save the temperature you like in each product's settings.
• Keep the machine indoors and away from cold.
• Descale when asked, with the water hardness set correctly. The Jura descaling guide has the steps.

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FAQ

Can I set a Jura's exact brew temperature?

Not in degrees. The S8 and Z6 offer low, normal or high per product, and the E6 and E8 have a temperature item in each product's settings. The Z6's milk temperature has ten levels.

Why does my Jura show Error 2 after a delivery?

It got cold in transit. JURA says long exposure to cold can disable heating for safety. Leave the machine to warm to room temperature before switching it on.

Will descaling make my Jura hotter?

JURA's manuals don't list scale as a cause of cool coffee. Their answers are prewarmed cups and the temperature setting. Descale when the machine asks, so its water path stays clear.

Is the first coffee of the day always cooler?

The manuals don't say so, but a cold cup cools a short drink the most. Prewarm the cup, and let the switch-on rinse run first.

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Related Jura Guides

• Jura Troubleshooting Guide: every message
• Jura Won't Turn On?: when nothing happens at all
• Jura E8 Problems: E8 messages
• Jura Z6 Problems: Z6 milk and spout messages

Sources: JURA Instructions for Use for the E6 (NAC), E8 (NAC), S8, Z6 and Z10 (NAA).