!!
critical Keurig
Error Code 3
The Brewer must be descaled now.
? What Causes This
When 4 dispense cycles in a row take longer than expected to brew, indicating mineral buildup.
✓ How to Fix It
Have your Keurig Authorized Distributor descale the brewer immediately to prevent damage.
Source: page 16 of the official manual
From the manual
This error code appears in:
Keurig Coffee Maker