Fellow
Fellow Coffee Makers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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CAL
Display shows “CAL” or calibration prompt and unit behaves erratically with temperature control.
Temperature Calibration Mode / Calibration Error
E1
Display shows “E1” and the coffee maker or kettle will not start.
Sensor Communication Error
E2
Display shows “E2” and heating stops mid-cycle.
Over-Temperature or Overcurrent Protection Error
E3
Display shows “E3” and the unit powers on but none of the heating or brewing functions work.
Relay / Power Switching Fault
E4
Display shows “E4” and the unit shuts down shortly after starting.
Internal Overheat / Enclosure Temperature Too High
E5
Display shows “E5” and the unit will not start a brew cycle, though power is on.
Lid / Safety Interlock Error
E6
Display shows “E6” and the unit beeps repeatedly, refusing to start.
Water Level / Reservoir Sensor Error
E7
Display shows “E7” and the brew pump does not run.
Pump Circuit Fault
E8
Display shows “E8” and the unit stops mid-brew with water still in the reservoir.
Flow Sensor / Flow Meter Error
E9
Display shows “E9” and the unit will not power on fully or reboots repeatedly.
Low Voltage / Power Supply Error
Err1
Display shows “Err1” and the kettle or coffee maker will not start heating.
Overheat / Dry-Boil Protection Triggered
Err2
Display shows “Err2” and heating stops or never starts.
Temperature Sensor Fault (Open or Shorted NTC)
Err3
Display shows “Err3” and the unit beeps or refuses to start a brew or heat cycle.
Control Board / Internal Electronics Fault
Err4
Display shows “Err4” and the unit will not operate.
Boil-Dry / Overcurrent Protection Lockout
Err5
Display shows “Err5” and the unit shuts off or refuses to start; sometimes accompanied by a clicking sound.
Heating Element Circuit Fault
Hi
Display shows “Hi” or an over-temperature warning even when water is not boiling, and heating stops.
False Over-Temperature Detection
Lo
Display shows “Lo” or a low temperature warning and will not reach or maintain set temperature.
Low Temperature / Underheat Condition
Symptom
Brewer or kettle emits a strong metallic or plastic smell during use.
Odor from New Components or Residue
Symptom
Coffee tastes like plastic, rubber, or chemicals when brewed with a Fellow electric brewer.
Taste Contamination from Components or Water
Symptom
Control knob or buttons on the Fellow electric kettle or brewer are unresponsive or intermittent.
User Interface / Encoder Failure
Symptom
Display or indicator lights flicker or dim during operation.
Unstable Power / Loose Connection
Symptom
Electric brewer brews extremely slowly or stops dripping mid-brew.
Restricted Flow / Clogged Brew Path
Symptom
Electric brewer does not start brewing when the start button is pressed.
Brew Start Interlock / Control Fault
Symptom
Electric brewer or kettle makes loud popping, banging, or crackling noises during heating.
Scale Buildup / Boiling Noise
Symptom
Electric brewer or kettle trips the household circuit breaker or GFCI outlet.
Ground Fault / Overcurrent
Symptom
Electric brewer overflows the filter basket, causing coffee and grounds to spill over.
Brew Basket Overflow
Symptom
Electric brewer stops brewing before the full volume is dispensed.
Premature Brew Termination
Symptom
Kettle handle feels loose or wobbly when pouring.
Loose Handle Mounting
Symptom
Kettle heats but never reaches set temperature or shuts off early.
Premature Shutoff / Inaccurate Temperature Control
Symptom
Kettle or brewer does not heat, but display and controls work normally.
Open Heating Element
Symptom
Kettle or brewer exterior becomes excessively hot to the touch (beyond normal warmth).
Insulation / Thermal Barrier Failure
Symptom
Kettle or brewer shuts off immediately after starting, with no error code.
Immediate Safety Cutoff / Faulty Switch
Symptom
Kettle or electric coffee maker will not power on at all (no lights, no display).
No Power / Dead Appliance
Symptom
Lid on kettle or brewer sticks, is hard to open, or does not seal properly.
Lid Mechanism / Gasket Wear
Symptom
Water drips or pours from the spout even when not pouring (leaking spout).
Spout Seal Failure / Overfilled Kettle
Symptom
Water leaks from the bottom of the kettle or electric brewer onto the counter.
Base or Boiler Leak
Symptom
Water level in the kettle or brewer appears to drop without visible leaks (steam loss).
Excessive Evaporation / Steam Venting
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| CAL |
Display shows “CAL” or calibration prompt and unit behaves erratically with temperature control.
|
Temperature Calibration Mode / Calibration Error | View Details |
| E1 |
Display shows “E1” and the coffee maker or kettle will not start.
|
Sensor Communication Error | View Details |
| E2 |
Display shows “E2” and heating stops mid-cycle.
|
Over-Temperature or Overcurrent Protection Error | View Details |
| E3 |
Display shows “E3” and the unit powers on but none of the heating or brewing functions work.
|
Relay / Power Switching Fault | View Details |
| E4 |
Display shows “E4” and the unit shuts down shortly after starting.
|
Internal Overheat / Enclosure Temperature Too High | View Details |
| E5 |
Display shows “E5” and the unit will not start a brew cycle, though power is on.
|
Lid / Safety Interlock Error | View Details |
| E6 |
Display shows “E6” and the unit beeps repeatedly, refusing to start.
|
Water Level / Reservoir Sensor Error | View Details |
| E7 |
Display shows “E7” and the brew pump does not run.
|
Pump Circuit Fault | View Details |
| E8 |
Display shows “E8” and the unit stops mid-brew with water still in the reservoir.
|
Flow Sensor / Flow Meter Error | View Details |
| E9 |
Display shows “E9” and the unit will not power on fully or reboots repeatedly.
|
Low Voltage / Power Supply Error | View Details |
| Err1 |
Display shows “Err1” and the kettle or coffee maker will not start heating.
|
Overheat / Dry-Boil Protection Triggered | View Details |
| Err2 |
Display shows “Err2” and heating stops or never starts.
|
Temperature Sensor Fault (Open or Shorted NTC) | View Details |
| Err3 |
Display shows “Err3” and the unit beeps or refuses to start a brew or heat cycle.
|
Control Board / Internal Electronics Fault | View Details |
| Err4 |
Display shows “Err4” and the unit will not operate.
|
Boil-Dry / Overcurrent Protection Lockout | View Details |
| Err5 |
Display shows “Err5” and the unit shuts off or refuses to start; sometimes accompanied by a clicking sound.
|
Heating Element Circuit Fault | View Details |
| Hi |
Display shows “Hi” or an over-temperature warning even when water is not boiling, and heating stops.
|
False Over-Temperature Detection | View Details |
| Lo |
Display shows “Lo” or a low temperature warning and will not reach or maintain set temperature.
|
Low Temperature / Underheat Condition | View Details |
| – |
Brewer or kettle emits a strong metallic or plastic smell during use.
|
Odor from New Components or Residue | View Details |
| – |
Coffee tastes like plastic, rubber, or chemicals when brewed with a Fellow electric brewer.
|
Taste Contamination from Components or Water | View Details |
| – |
Control knob or buttons on the Fellow electric kettle or brewer are unresponsive or intermittent.
|
User Interface / Encoder Failure | View Details |
| – |
Display or indicator lights flicker or dim during operation.
|
Unstable Power / Loose Connection | View Details |
| – |
Electric brewer brews extremely slowly or stops dripping mid-brew.
|
Restricted Flow / Clogged Brew Path | View Details |
| – |
Electric brewer does not start brewing when the start button is pressed.
|
Brew Start Interlock / Control Fault | View Details |
| – |
Electric brewer or kettle makes loud popping, banging, or crackling noises during heating.
|
Scale Buildup / Boiling Noise | View Details |
| – |
Electric brewer or kettle trips the household circuit breaker or GFCI outlet.
|
Ground Fault / Overcurrent | View Details |
| – |
Electric brewer overflows the filter basket, causing coffee and grounds to spill over.
|
Brew Basket Overflow | View Details |
| – |
Electric brewer stops brewing before the full volume is dispensed.
|
Premature Brew Termination | View Details |
| – |
Kettle handle feels loose or wobbly when pouring.
|
Loose Handle Mounting | View Details |
| – |
Kettle heats but never reaches set temperature or shuts off early.
|
Premature Shutoff / Inaccurate Temperature Control | View Details |
| – |
Kettle or brewer does not heat, but display and controls work normally.
|
Open Heating Element | View Details |
| – |
Kettle or brewer exterior becomes excessively hot to the touch (beyond normal warmth).
|
Insulation / Thermal Barrier Failure | View Details |
| – |
Kettle or brewer shuts off immediately after starting, with no error code.
|
Immediate Safety Cutoff / Faulty Switch | View Details |
| – |
Kettle or electric coffee maker will not power on at all (no lights, no display).
|
No Power / Dead Appliance | View Details |
| – |
Lid on kettle or brewer sticks, is hard to open, or does not seal properly.
|
Lid Mechanism / Gasket Wear | View Details |
| – |
Water drips or pours from the spout even when not pouring (leaking spout).
|
Spout Seal Failure / Overfilled Kettle | View Details |
| – |
Water leaks from the bottom of the kettle or electric brewer onto the counter.
|
Base or Boiler Leak | View Details |
| – |
Water level in the kettle or brewer appears to drop without visible leaks (steam loss).
|
Excessive Evaporation / Steam Venting | View Details |
No matching codes found
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