You might be able to estimate the size and keep the old K-cup in. For example, if there’s just a small amount of coffee in your cup when you originally selected the largest size, try a medium size the second time around.

If you have a reset switch on the outlet, you might try pushing that in as well. Plug in a different appliance and see if it works where you had your Keurig plugged in. Because Keurig brewers use a lot of power, Keurig recommends plugging your brewer into its own dedicated outlet. If the outlet is overloaded with other appliances, your Keurig might not work. [4] X Research source

Plug it back in after 30 seconds and see if this solves your issue. If it’s still not working, unplug your machine again, and continue on to the following steps.

If there’s any water left inside that had already been pumped out of the reservoir before the machine stopped working, you can clear that by pressing and holding the brew button after you plug your Keurig back in.

The way to access the needles varies depending on which Keurig model you have. You should be able to see them when you lift the handle and remove the K-cup from the holder.

If the lights don’t come on or your Keurig still won’t run a brew cycle, you might need to clean or descale the machine.

You might think of cleaning and descaling as a chore, but they’re quite simple once you get the hang of it and shouldn’t take more than a few minutes of your time. If the red drip tray light comes on, that means the drip tray is full and needs to be emptied. Just slide it off toward you and empty it in the sink. You can give that a rinse as well, but don’t put it in the dishwasher. [10] X Research source

Have the model of your Keurig handy when you call, as well as how old it is (if it’s more than a year old, a rough idea is fine). Keurig’s warranty lasts one year from the date of purchase. They’ll extend it an additional 12 months beyond that year if you connect your brewer to the Keurig app through WiFi at least once every 90 days for that full 2 years. [12] X Research source