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ErrBase

Keurig Coffeemaker Error Codes

All Keurig coffeemaker error codes with step-by-step troubleshooting, multimeter specs, and OEM part numbers.

10 error codes

CodeMeaning
ADD-WATERWhen your Keurig throws 'Add Water' with a full reservoir, it means the reed switch inside the machine base isn't detecting the magnet on the float disk. The float's stuck down, the magnet's gotten weak, or the switch itself has failed. The machine genuinely thinks it's empty.
lowbeginner
DESCALE-LIGHTThe descale light staying on means the reset sequence wasn't completed. It's not a sensor detecting scale. It's basically a counter, like an oil change light in your car, that trips after roughly 250 brew cycles. You ran the descale, but didn't finish the reset handshake the firmware's waiting for.
lowbeginner
ERROR-2Error 2 means the water flow sensor inside your K-Supreme or K-Cafe Smart clocked the water moving too slowly through the brew system. Water's either blocked by mineral scale, a clogged needle, or an air bubble in the line, and the sensor just threw up its hands.
lowbeginner
HUBComplete guide to Keurig coffee maker error codes and messages across K-Supreme, K-Elite, K-Cafe, K-Mini, and 2.0 models. Keurig uses numeric codes, text messages, and descale lights to communicate faults.
lowbeginner
LEAKINGYour Keurig is physically leaking water outside of its normal brew path. The machine pressurizes water through a needle system into the K-Cup and back out the bottom needle, and when that path gets blocked or a seal fails, water backs up and escapes somewhere it really shouldn't be going.
moderateintermediate
NOT-BREWINGThe brewer's control board detected that water isn't moving through the system when a brew cycle was initiated. Could be a blocked needle, an air-locked pump, heavy scale buildup in the lines, or the machine's sensors failing to confirm water is present in the reservoir.
moderateintermediate
NOT-HOTYour Keurig's heating element isn't getting water to the target 192F. Either mineral scale is insulating the heating coil from the water flowing past it, the machine hasn't had enough warmup time to reach operating temp, or the element itself is starting to lose efficiency. The board won't throw a hard error code for this. It just delivers lukewarm coffee and waits for you to notice.
moderateintermediate
PRIME'Prime' on a Keurig means the internal pump can't pull water from the reservoir into the brew system. The pump's running, it's trying, but there's an air gap somewhere in the line and water isn't moving. No water means no brew, and that PRIME error just keeps staring at you.
lowbeginner
SHORT-CUPThe machine's flow meter clocked less water moving through than what you selected. Something's restricting flow between the reservoir and your cup, either a clogged needle, scale buildup in the internal lines, or an air pocket that's partially blocking the pump. The brewer just stops when it detects the slowdown.
moderateintermediate
WONT-TURN-ONThe machine's internal thermal cutoff tripped or the control board lost power entirely. The thermal fuse is a one-shot safety device that permanently opens the circuit when temps spike past a set point, usually around 167°F. Once it blows, nothing works until it's replaced or the board gets reset.
moderateintermediate