Display briefly shows ERR or ERROR and the coffee maker beeps and stops responding to button presses.

Safety first: Unplug the coffee maker before opening the control panel.

Simple reset and drying:

• Unplug the unit for 10–15 minutes.
• If a spill occurred near the control panel, tilt the machine gently to allow any trapped liquid to drain away from the electronics.
• Let the unit air dry for several hours before retrying.

Keypad inspection:

• Remove the screws securing the control panel bezel and gently lift it away.
• Inspect the keypad membrane and underlying PCB for signs of moisture, corrosion, or physical damage.
• Clean the area with isopropyl alcohol and a soft cloth if sticky residue is present.

Ribbon cable and connector check:

• Locate the ribbon cable connecting the keypad to the main board.
• Disconnect and reconnect the cable to ensure a solid connection; inspect for bent or broken traces.

When to replace:

• If one or more buttons remain unresponsive or always appear pressed, replace the keypad membrane / user interface board for your model.
• If the keypad tests good but ERR persists, the main control PCB may have a communication fault and should be replaced.