Buy links on this page go through our /go/ redirects to the manufacturer or retailer. We earn nothing from them today; that may change. Disclosure.
In short
Keurig's troubleshooting lists three causes of a partial cup: a clogged exit needle, a reservoir that was removed during brewing, or a brewer that needs descaling. Work through them in that order. If you've descaled twice and it still brews short, Keurig says to contact Customer Service.
Three causes, in order
- Clean the exit needle. Take out the pod holder and clear the needle with a straightened paper clip. See how to clean the needles.
- Reseat the reservoir. If the reservoir was lifted during a brew, Keurig says to put it back and run a rinsing brew with no pod.
- Descale. Follow the full steps for your model. Keurig says to contact Customer Service if two descales don't fix it.
Short cups right after descaling
Keurig says a heavily scaled brewer may not fill properly after the descaler goes in. You may see little or no output, then hear air blowing. Its fix:
- Turn off and unplug the brewer.
- If there's descaling solution in the reservoir, pour it out, rinse the reservoir well and refill with water.
- Plug it back in, power on, and repeat the fresh water rinse. Keurig says it should start working normally as the solution rinses out and the scale clears.
- If it still stalls, leave it unplugged for at least 30 minutes, then continue the rinse.
Also check
- Water level. If the add water light stays on after you refill to MAX and seat the reservoir, the K-Elite guide says to contact Customer Service.
- Water type. Keurig's guides say not to use distilled water. They suggest bottled or filtered water, or a Keurig water filter, if the taste is off.
How we work: causes and fixes come from the troubleshooting pages of Keurig's K-Elite, K-Supreme SMART, K-Duo and K200 Use & Care Guides. Sources are listed below.
Questions people ask
Why is my Keurig not brewing a full cup?
Keurig's troubleshooting lists a clogged exit needle, a reservoir removed during brewing, or a brewer that needs descaling.
Why is my Keurig not brewing a full cup after descaling?
Keurig says a heavily scaled brewer may not fill after the descaler goes in. Turn it off, unplug it, empty and rinse the reservoir, refill with water, and repeat the fresh water rinse.
When should I call Keurig?
If you've descaled twice and it still brews a partial cup, Keurig says to contact Customer Service.
Sources
Last checked Oct 23, 2026. Steps come from Keurig's own Use & Care Guides. Unplug the brewer before cleaning the needles, and keep your fingers out of the pod holder, as Keurig warns.
