Keurig Mini single-serve coffee systems can develop problems with function mostly related to improper setup or clogs within the system. Keurig Mini models include the B30 model, and the MiniPlus models K10 and B31. If a more complex problem arises, contact Keurig customer support for servicing. Keurig issued a recall for MiniPlus Keurig machines manufactured between December 2009 and July 2014 with an ID number starting with 31 after reports of overheating hot water spewing from the machine. Contact Keurig customer support for a repair kit to fix the problem.
Keurig recommends that its machines be plugged into a dedicated grounded outlet or an outlet on a circuit that is not overloaded with multiple major appliances. To avoid any plastic or chemical taste, run one or two cycles of plain water through the machine without a K-Cup in the K-Cup holder. To brew a cup of coffee, start by lifting the handle at the front of the Keurig Mini to open the K-Cup holder. Place a K-Cup in the holder and close the lid. As the lid closes, prongs on the holder assembly puncture holes through the lid and bottom of the cup so water can pass through. Keurig Mini models do not have removable water reservoirs, so you must pour the amount of water for one cup in the hot water tank at the rear of the machine. Set a cup under the dispenser and press the "brew" button to make a cup of coffee.
Priming and Power
Keurig Mini machines often have trouble brewing when used for the first time or after a long period of storage or cold exposure. It may be necessary to fill the tank and press "brew," then wait about two hours before selecting the cup size to allow the machine to prime. The machine may require resetting if it shuts off before completing the brew cycle -- simply lift the handle and close the K-Cup holder again to reset the system. Failing these fixes, try pressing and holding the brew button until the Keurig finishes brewing the hot beverage.
Clogged Exit Needle
A clogged exit needle results in an unpleasant gulp of coffee grounds. Clogged needles are often caused by using too fine a grind for a reusable K-Cup filter or when hot chocolate mix sticks to the needle wall. The needle is located on the bottom side of K-Cup holder and fits into the K-Cup funnel. This is the small hollow through which hot beverages pass just before dripping into the cup. To dislodge the clog and fix the Keurig Mini, pull the K-Cup holder out of the funnel. Poke and swirl a paper clip in the exit needle to clear the clog. Rinse the piece well before replacing it on the Keurig.
Mineral content in water builds up inside Keurig Mini machines, which can slow performance and affect the hot beverage flavor. Keurig recommends descaling the machine every 3 to 6 months for best operation. Pour at least 8 ounces of white vinegar in the hot water tank. Brew the vinegar through the machine and into a cup under the dispenser. Pour the vinegar back into the reservoir, begin the cycle, and turn off the machine just as it begins to brew. Resume the cycle after about 30 minutes. Run about six cycles of clean water through the system to rinse out the vinegar before use.
A drip tray under the dispenser helps prevent unwanted mess from coffee spills, but the Keurig Mini will not operate when the tray is full. A red light on the drip tray indicates it must be emptied. Slide the tray out of place by pulling it straight out. Dump the overflow contents and wash the tray with hot, soapy water.