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A Keurig that hums, gurgles, or blows air but will not pump water almost always has one of two problems: an airlock in the water line or scale blocking it. Keurig's own use and care guide describes the symptom: a heavily scaled brewer "may not fill properly," dispensing little or nothing "followed by the sound of air blowing out." Both are fixable at home in under an hour. Work through the seven fixes in order, cheapest first.
The 7 fixes, in the order to try them
1. Reseat the water tank so the valve engages
The reservoir feeds the pump through a spring valve on its underside, and if the tank is not seated square, that valve never opens. Lift the reservoir straight up, check the valve opening at the bottom for grit or a stuck spring, then press the tank back down until it sits flush. Keurig's setup instructions specifically say to make sure "the lock tabs engage with the brewer." A tank riding a millimeter high is a very common cause of a no-water condition, and it costs nothing to rule out.
2. Check the water level, then add more anyway
Keurig's troubleshooting section for a brewer that will not brew says a minimum of 6oz of water is required, and its fix is to add another 2oz beyond what looks like enough, press brew, and repeat until the machine dispenses. The sensor can read low even when the tank looks half full.
3. Burp out the airlock
This is the folk fix, and it works because air trapped between the reservoir valve and the pump stops the pump from pulling water. It is not in the official manual, but it is the standard first move among Keurig owners. Unplug the machine, empty the reservoir and drip tray, hold the brewer over a sink, and give it a few firm shakes or gentle upside-down turns with the tank off. A gentler version: fill the tank about a quarter full, then lift it off and press it back on several times so water slaps through the intake and pushes the bubbles out. Refill, plug in, and run a water-only brew.
4. Clear the needles with a paper clip
Grounds packed into the entrance or exit needle block flow at the very end of the line, which reads as "no water" even though the pump is fine. Keurig's procedure: unplug the brewer, remove the pod holder, detach the funnel, and run a straightened paper clip into the exit needle at the bottom of the pod holder. Then lift the handle and work the paper clip into both holes of the entrance needle under the lid. Finish with two water-only brew cycles, no pod. The needles are sharp, so keep your fingers out of the pod holder. If you would rather not sacrifice office supplies, a purpose-made needle cleaning tool kit does the same job with a handle on it.
5. Descale, the full procedure
Scale narrows the internal lines until the pump cannot push water through them. Keurig says to descale every 3 to 6 months, and the K-Slim manual tightens that to every 3 months. The short version of the official procedure: empty the reservoir, pour in a full bottle of descaling solution plus a bottle's worth of water, run repeated large brews with no pod until the add water light comes on, then rinse the tank and run fresh-water brews until the light comes on again. On newer models you activate descale mode first; on the K-Slim that is holding the 8oz and 12oz buttons for 3 seconds with the brewer off. A badly scaled machine may sputter air mid-descale. Keurig's guidance for that: unplug it, rinse the reservoir, refill with fresh water, and repeat the rinse cycles, letting the brewer sit unplugged for at least 30 minutes if it keeps struggling.
6. Prime the pump with a purge
Some models have a hidden purge that forces water through the lines and re-primes the pump. On the K-Slim, Keurig's manual says to power the brewer off, then press and hold the brew and 12oz buttons for 5 seconds until water starts dispensing, let it purge, and discard the water. The button combination varies by model. Not sure which machine you own? Our which Keurig do I have guide sorts it out from the buttons and shape.
7. Pull the water filter and do a hard reset
A clogged charcoal filter cartridge in the reservoir can choke intake on its own. Remove the filter holder and test a brew without it; if water flows, replace the cartridge. Then do the universal reset: unplug the brewer for a few minutes, plug it back in, and run a water-only brew. If none of the seven fixes work, the pump itself may have failed. Keurig customer service is 1-866-901-BREW (2739), and brewers under a year old are covered by the limited warranty.
Symptom to fix, at a glance
| What you hear or see | Most likely cause | Start with fix |
|---|---|---|
| Loud hum or grind, no water moves | Airlock in the line | 3 |
| Sputters a little water, then blows air | Scale buildup | 5 |
| Add water light on with a full tank | Tank not seated, valve stuck | 1 |
| Brews a weak dribble or partial cup | Clogged needles | 4 |
| Dead silence, no pump sound at all | Pump or power fault | 7 |
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Related Keurig problems
If the descale light will not turn off even after running the full procedure, that is its own fix path: see Keurig descale light stays on. Drip machine doing something similar? The causes overlap a lot: coffee maker not brewing a full pot. And once it is pumping again, our Keurig caffeine content table covers what is actually in the cup it makes.
FAQ
Why does my Keurig make noise but not pump water? Trapped air or scale is blocking the line between the reservoir valve and the pump. Burp the machine first (fix 3), and if it still struggles, run Keurig's full descale procedure (fix 5).
Can I descale a Keurig with vinegar instead of descaling solution? Keurig's official procedure calls for its descaling solution. Many owners use a diluted white vinegar and water mix instead, but plan on extra fresh-water rinse cycles to clear the taste, and know that Keurig's instructions are written around the solution.
How often should I descale my Keurig? Keurig says every 3 to 6 months, and every 3 months for models like the K-Slim. Hard water areas should stay at the short end of that range.