Keurig Error Codes & Blinking Lights: Complete Fix Guide

Keurig Error Codes: What Your Brewer Is Actually Telling You

Keurig home brewers don't have numbered error codes. Across eleven Keurig Use & Care Guides, not one lists an "Error 2" or an "Error 9". What they do use is a small set of lights: ADD WATER, DESCALE, size buttons that blink or stay lit, and on two machines, a pattern of every light at once. Read the light, and the guide tells you the fix.

That's good news, because every documented signal has a documented fix, and most take a few minutes. The table below covers what the K-Mini, K-Slim, K-Express, K-Supreme family, K-Elite, K-Duo Plus, K-Duo Essentials and K-Brew+Chill guides actually say.

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Keurig Error Code List: Every Documented Light

Nothing in any of these guides describes a "Prime" message, an "Oops" screen, an overheating light, a float or magnet sensor, or a reset button. If a page tells you what one of those means, it isn't quoting Keurig.

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Have a Specific Numbered Error? Jump to Your Fix

Numbers like "Error 2" and "Error 9" circulate widely online, but no Keurig Use & Care Guide defines one. The words "error" and "code" don't appear once in either K-Duo guide, the model searched most often for codes. In the K-Supreme SMART guide, "code" only ever means the QR code you scan to pair it with the app.

So a number you've seen on a forum usually describes one of the lights above. These pages take each commonly searched number and walk through what your brewer is really showing:

• Keurig Error Code 2
• Keurig Error Code 3
• Keurig Error Code 5
• Keurig Error Code 6
• Keurig Error Code 8
• Keurig Error Code 9
• Keurig Error Code 11
• Keurig Error Code 17

Error 1, 4, 10 or a "technician code"? The same answer applies: no Keurig home-brewer guide defines it. Commercial brewers are different territory. "Error 17 Keurig commercial series" is a real search, but no commercial Keurig manual (B150, K150/K155) was read for this site, so we won't guess at their codes. Office owners should call the number on the brewer or their service provider.

If there's a number on a screen you can photograph, call Keurig at 1-866-901-BREW (2739) and describe exactly what the brewer shows.

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Try This First

• Look at which light is on, not just that one is. ADD WATER, DESCALE and "everything at once" have completely different fixes.
• Add water above the minimum. Most brewers need at least 6oz in the reservoir. The guides' own fix is to add 2oz more and press brew again.
• Lift the reservoir and set it back down firmly. A reservoir that isn't seated reads as empty.
• Open and close the handle fully. Several guides say the handle must be pushed down securely before the brewer will start.
• Press the power button. A dark brewer has often just timed out. Auto Off runs from 90 seconds (K-Mini) to 2 hours (K-Elite).

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ADD WATER Light On (Or Won't Go Off)

The ADD WATER light means the brewer doesn't have enough water to make the size you chose. It's also the normal end signal of each pass during descaling, so seeing it mid-descale isn't a fault.

Keurig's documented fix, from the K-Slim, K-Supreme and K-Supreme SMART guides:

1. Add water to the reservoir. A minimum of 6oz is required to brew.
2. Add an additional 2oz so you're clearly over the minimum fill level, then press the brew button.
3. Repeat until the brewer begins to dispense.
4. Lift the reservoir and reseat it so it sits properly in its base. The K-Express guide says to "lift up and replace the reservoir to ensure a secure fit on the base".
5. Fill to, not beyond, the MAX line. The K-Elite and K-Duo guides are specific about this.

Still lit after refilling and reseating? Every guide that mentions it gives the same answer: contact Customer Service. There's no sensor to clean in the guides and no magnet to adjust, and we'd be wary of any page that tells you to open the base.

The K-Mini has no ADD WATER light at all, because you pour in exactly one cup's worth (6oz to 12oz) each time. If a K-Mini won't brew, check you've added at least 6oz.

Our ADD WATER light guide covers this problem on its own.

Time: 2-5 minutes

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DESCALE Light On or Won't Turn Off

A lit DESCALE light means scale is due to be cleared, and it only goes out when the brewer sees a full descale finish. The K-Express guide says it plainly: "the full descaling procedure must be completed to turn off the Descale light."

That's why most "stuck" descale lights are really an unfinished rinse. The end point differs by model:

Use a whole bottle of Keurig Descaling Solution plus a bottle of water on the full-size brewers, a large ceramic mug (not paper), no pod, and take the water filter out first. Foam during descaling is normal, according to the guides.

Two things that stop a descale partway:

• A heavily scaled brewer can stop filling. You'll see little or no output, then hear air. The guides say: turn it off and unplug it, discard the solution, rinse and refill the reservoir, then repeat the fresh-water rinse. If it still won't pump, leave it unplugged for at least 30 minutes before carrying on.
• Pulling the reservoir or stopping the rinse early. The light stays on because the brewer never saw the cycle end.

No combination turns the light off without descaling. The button holds in the table only start Descale Mode. The full walkthrough, including the K-Elite's long rinse, is in our Keurig descale light guide.

Time: 15-45 minutes by model
Cost: About $10-15 for a bottle of Keurig Descaling Solution

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Partial Cups or Nothing Comes Out

A brewer that runs but only half-fills the mug isn't in a fault mode, but it's the problem most "error code" searches actually describe. Every guide lists the same three causes: a clogged exit needle, a dirty pod holder, and scale.

1. Run the purge, if your model has one. Brewer powered off:
   • K-Slim and K-Supreme: hold brew + 12oz for 5 seconds until water starts dispensing, let it purge, discard it, then press power.
   • K-Express: hold 12oz alone for 5 seconds.
   • K-Mini: press power, then hold brew for 5 seconds until all the water has dispensed.
2. Clear the exit needle. Lift the handle, remove the pod holder, pull off the funnel, and push a straightened paper clip into the needle at the bottom of the holder.
3. Clear the entrance needle. With the handle up, push the paper clip into the holes on the underside of the lid (the K-Supreme family has several entrance needles). Then run two water-only brews with no pod.
4. Descale (section above).

On a K-Elite or K-Duo, also check you didn't lift the reservoir mid-brew. Both guides list that as a cause, and the fix is to replace it and run a rinsing brew with no pod.

The guides draw one clear line: if you've descaled twice and it still only brews a partial cup, contact Customer Service. Our partial cup guide and needle cleaning guide go into more detail.

Time: 10-20 minutes
Tools: A straightened paper clip

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All Lights On or All Lights Blinking at Once

This is the closest thing Keurig has to an error code, and it's documented on two families.

K-Elite: all the size lights and ICED on together (steady). The guide's fix:

1. Lift the handle and remove the K-Cup pod, if one is in.
2. Close the handle and put a large mug on the drip tray.
3. Press the power button once. The brewer may dispense hot water.

K-Elite: the 4, 6, 8, 10 and 12oz lights all blinking together. The guide gives no owner step, only "contact Customer Service".

K-Duo Plus and K-Duo Essentials: all of the buttons blinking simultaneously. Same answer: contact Customer Service. This is almost certainly what K-Duo owners mean when they search for a K-Duo "error" number. Our K-Duo error guide covers the K-Duo's other signals.

For other models, no Use & Care Guide describes an all-lights pattern. If yours is doing it, try a power cycle and the checks in Try This First. If it comes back, call Keurig rather than trusting a reset sequence from the internet. Only the SMART brewers (K-Supreme SMART, K-Café SMART) have a factory reset, as an item in their Settings menu. No Keurig guide documents a hard reset or diagnostic mode, and the only button combinations start Descale Mode, High Altitude mode, Strong mode or the partial-cup purge.

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No Lights, or It Shuts Itself Off

A dark panel is usually Auto Off, which every Keurig has and which differs a lot between models:

Press power (or on the K-Slim and K-Express, lift and lower the handle) and it wakes. If it has no power at all, the guides' only steps are to check the power button, and to plug it into its own grounded outlet, because "if the electric circuit is overloaded with other appliances, your brewer may not function properly". After that, contact Customer Service.

Moved it or stored it somewhere cold? If the brewer has been below freezing, the guides say to let it warm to room temperature for at least 2 hours before using it. Our Keurig won't turn on guide covers power faults in full.

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Keurig Lights by Model

K-Mini

One brew indicator and a power button. The light flashes when it's ready, goes solid and then pulses while heating (about 2 minutes), turns solid as it dispenses and goes out when brewing is done. There's no ADD WATER and no DESCALE light. Descale every 3-6 months on your own schedule.

K-Slim

ADD WATER and DESCALE indicators, three size buttons (8, 10, 12oz) and a brew button. The sizes blink while it waits, the brew button stays lit while it heats and brews, and brewing is done when the buttons go dark. There's no temperature setting. Our K-Slim light guide covers it.

K-Express

The three sizes blink while it waits, and the chosen size stays lit while brewing. Unusually, brewing is complete when the sizes are all lit, the opposite of the K-Supreme. It has a maintenance alert every 250 brews and a Strong Brew Mode (powered off, hold STRONG 3 seconds; it blinks twice).

K-Supreme, K-Supreme Plus and K-Supreme SMART

Four sizes (6, 8, 10, 12oz) blink while it waits, the brew button stays lit while brewing, and brewing is done when the buttons go out. The SMART's troubleshooting adds two named problems: a pod not recognized (connect to Wi-Fi for BrewID, use an unpunctured genuine Keurig pod) and "Brewer Will Not Close or Brew With My K-Cup", which is an old My K-Cup filter. Only the version with five holes in its lid fits. See our K-Supreme SMART guide.

K-Elite

A green power light and a clock screen. It takes about 3 minutes to heat at first power-on. It's the only Keurig here with a temperature setting (187°F to 192°F), and in High Altitude mode that setting locks and the mountain icon flashes if you try to change it. A sun icon means Auto On is set, and a moon means Auto Off is on. Its two all-lights patterns are covered above.

K-Duo Plus and K-Duo Essentials

The K-Duo Plus brew light pulses slowly while heating (about 4 minutes the first time) and goes solid once brewing starts. On the K-Duo Essentials, a finished carafe brew is signalled by the CUPS button turning red, and the warming plate stays on 2 hours unless you hold CUPS for 3 seconds. "All buttons blinking simultaneously" means contact Customer Service on both.

K-Brew+Chill

This one has extra indicators for its Chill Tank. CHILL TANK lit means top up the tank, RINSE blinking after a cold brew is the automatic 1-minute rinse (don't open the handle), and a red marker on the drip tray means it's full. See our K-Brew+Chill guide.

K-Classic

We couldn't get Keurig's K-Classic (K55) guide from Keurig, and the copy we found online contradicted itself, so we won't publish K-Classic light meanings. If yours shows a light pattern not covered by the ADD WATER, DESCALE or partial-cup sections, call Keurig.

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When to Call Keurig

Stop using it and unplug it if:

• You smell burning or see smoke
• Water is pooling under the brewer near the power cord
• It trips a breaker or blows a fuse
• The cord or plug is damaged

Call Keurig at 1-866-901-BREW (2739), or use support.keurig.com, when:

• ADD WATER stays lit after refilling and reseating
• All lights blink together (K-Elite, K-Duo)
• It brews partial cups after two full descales
• It has no power on its own outlet

Warranty: a one-year limited warranty in the US and Canada. Keurig repairs or replaces the brewer at its option, and the replacement may be reconditioned. Get a Return Materials Authorization (RMA) number before sending anything, because brewers returned without one come back unserviced. The guides also say that beyond cleaning and descaling, "this brewer is not user serviceable", so opening it yourself isn't something Keurig supports.

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Keep the Lights Off

Don't use distilled water. Several guides warn against it, and suggest bottled or filtered water if your tap water tastes of chlorine or minerals.

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FAQ

Does Keurig have an official error code list?

No. None of the eleven Keurig Use & Care Guides read for this site contains a numbered code list, and Keurig's alerts are all named lights. Keurig's support site blocked our automated reading, so we can't rule out an online-only list. But nothing in the manuals that ship with the brewers uses numbers.

What does it mean when all the lights on my Keurig are flashing?

On a K-Elite or K-Duo, it means contact Customer Service; the guides give no owner fix. If the K-Elite's lights are on steadily instead of blinking, remove the pod, close the handle and press power once. For other models, no guide defines the pattern, so power-cycle it and call Keurig if it returns.

Can I reset my Keurig to clear an error?

Not with a documented fault reset. Only the SMART brewers have a Factory Reset (in the Settings menu), and Keurig doesn't offer it as a fix for any fault; no guide has a hard reset or service mode. Unplugging it and plugging it back in is harmless, but the lights that matter (ADD WATER, DESCALE) clear only when their cause is fixed. The button holds you'll find online start Descale Mode at best.

How hot does a Keurig brew?

Only the K-Elite publishes a figure. Its temperature setting runs from 187°F to 192°F, and it can't be changed in High Altitude mode. No other Keurig guide states a brew temperature, so treat any single number quoted for other models as a guess.

Why does my Keurig say ADD WATER when the tank is full?

Usually because the reservoir isn't seated, or it's just under the 6oz minimum. Lift it off, set it back firmly, and add 2oz more. If ADD WATER stays on after that, every guide says to contact Customer Service.

My K-Mini has no lights except the brew button. Is something missing?

No, that's the whole panel. The K-Mini has just a power button and one brew light, with no ADD WATER or DESCALE indicator. It's filled per cup and descaled on a 3-6 month schedule, so a K-Mini can't show most of the alerts in this guide.

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Related Keurig Fixes

• Keurig Descale Light Won't Turn Off: the full rinse sequence by model
• Keurig ADD WATER Light Won't Turn Off
• Keurig Not Brewing a Full Cup
• Keurig K-Duo Error Codes
• Keurig Won't Turn On

Sources: Keurig Use & Care Guides for the K-Mini, K-Slim, K-Express, K-Supreme, K-Supreme Plus, K-Supreme SMART, K-Elite, K-Duo Plus, K-Duo Essentials (Gen 2) and K-Brew+Chill.