Carafe glass is cracked or broken, or carafe does not sit correctly on the warming plate.

Safety: Do not use a cracked or broken glass carafe; it can shatter with heat.

Replace carafe:

• Purchase a genuine KitchenAid replacement carafe designed for your model to ensure proper fit and sensor activation.

Check sensor operation:

• After installing the new carafe, verify that the coffee maker recognizes it and brews normally.