The display shows “ERR1” and the coffee maker will not brew.

Safety first: Unplug the coffee maker and allow it to cool completely before opening the base or accessing internal parts.

Basic Reset:

• Unplug the appliance for 10 minutes to clear any temporary error.
• Plug it back in and attempt to start a brew. If ERR1 reappears immediately, proceed with the inspection.

Inspect Thermistor Connection (for experienced DIYers):

• Remove the bottom cover (typically secured by several Phillips screws).
• Locate the heater plate and the attached temperature sensor (thermistor), which is typically a small bead or disc sensor clipped to the heater or plate.
• Check that the thermistor wires are intact and firmly connected to the main control board harness.
• Look for signs of heat damage or melted insulation.

If the thermistor is physically damaged or the wiring is burnt, the heater/thermistor assembly should be replaced as a unit. If the wiring appears intact but ERR1 persists, the control board may be faulty, and professional service is recommended.