Display shows “Err3” and the unit beeps or refuses to start a brew or heat cycle.

Safety first: Unplug the unit before any inspection.

• Hard reset: Unplug the coffee maker or kettle for 5–10 minutes to fully discharge internal capacitors, then plug back in and test.
• Check for power issues: Try a different outlet (avoid power strips or surge protectors temporarily) to rule out low voltage or bad outlet.
• Inspect for moisture: Look for condensation or spills around the display and control knob. If moisture is present, allow the unit to dry for 24 hours before retrying.
• Surge protection: If Err3 appeared after a power outage or lightning storm, the control board may be damaged.
• If Err3 persists: The main control PCB likely needs replacement. This requires disassembling the housing, disconnecting ribbon cables, and installing a new board matched to your Fellow model. This is an advanced repair; contact Fellow support for parts and service options.