Oster 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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ADD WATER
Display shows ADD WATER or a water droplet icon and brewing will not start.
Low Water Level Detection / Reservoir Not Seated
CLEAN
The CLEAN indicator light stays on or flashes and the coffee maker beeps, sometimes refusing to start a normal brew.
Descale / Cleaning Cycle Required
E1
Display shows E1 and brewing will not start or stops immediately on Oster programmable coffee maker.
Temperature Sensor (NTC Thermistor) Fault
E2
Display shows E2 and the coffee maker will not heat or brew.
Overheat / Thermal Fuse or High-Temperature Cutoff Fault
E3
Display shows E3 and brewing stops shortly after starting on Oster digital coffee maker.
Water Level / Flow Detection Fault
E4
Display shows E4 and the coffee maker beeps and refuses to start brewing.
Carafe / Drip-Stop Switch Fault
E5
Display shows E5 and the unit will not power on fully or respond to buttons.
Control Board / Keypad Communication Fault
ERR
Display shows ERR and the coffee maker beeps, with no brewing function.
General Control Error / Firmware Fault
HOT
Display shows HOT or a hot surface icon and the unit will not start a new brew cycle immediately after finishing one.
Overtemperature Lockout / Brew Interlock
NO CARAFE
Display shows NO CARAFE or a carafe icon and the unit will not start brewing.
Carafe Presence Detection Fault
Symptom
Auto-brew (programmed start) does not work, but manual brewing works fine.
Programming / Timer Logic Fault
Symptom
Brewed coffee has a burnt or bitter taste.
Over-Extraction / Overheating
Symptom
Brewed coffee has a metallic or rusty taste.
Metallic Contamination / Corrosion
Symptom
Brewed coffee has a plastic or chemical taste, especially on a newer Oster coffee maker.
Residue / Manufacturing Oils in Water Path
Symptom
Brewed coffee is weak or watery even when using normal amounts of coffee.
Under-Extraction / Short Brew Time
Symptom
Built-in grinder runs but no ground coffee reaches the filter basket.
Grinder Chute Blockage
Symptom
Buttons on the control panel are unresponsive or only work intermittently.
Keypad / Membrane Switch Failure
Symptom
Coffee maker does not power on at all; no lights or display on Oster digital coffee maker.
No Power / Dead Unit
Symptom
Coffee maker emits a burning smell during operation.
Overheating / Electrical Insulation Breakdown
Symptom
Coffee maker emits a moldy or musty odor during brewing.
Microbial Growth in Water Path
Symptom
Coffee maker leaks water from the bottom during or after brewing.
Internal Leak in Water Circuit
Symptom
Coffee maker makes loud gurgling, popping, or banging noises during brewing.
Air in Water Lines / Scale-Induced Boiling Noise
Symptom
Coffee maker overflows the filter basket, spilling grounds into the carafe.
Brew Flow Imbalance / Overfilling
Symptom
Coffee maker starts brewing but stops mid-cycle, leaving water in the reservoir.
Intermittent Heating / Thermal Cutout Tripping
Symptom
Display and lights flicker or dim when the coffee maker is brewing.
Voltage Drop / High Current Draw
Symptom
Display clock loses time or resets frequently on Oster programmable coffee maker.
Unstable Low-Voltage Power / Memory Retention Issue
Symptom
Display is very dim or completely blank, but the coffee maker still brews when buttons are pressed.
Display Backlight / LCD Failure
Symptom
Oster coffee maker powers on but will not start brewing when the BREW button is pressed.
Brew Start Interlock / Control Logic Fault
Symptom
Oster coffee maker shuts off immediately or within a few minutes of starting a brew cycle.
Power Interruption / Overcurrent Protection
Symptom
Oster coffee maker turns on and makes clicking sounds, but no water flows and no coffee is brewed.
No Water Flow / Blocked Heating Tube
Symptom
Oster coffee maker with built-in grinder does not grind beans or makes a loud humming noise without grinding.
Grinder Motor / Burr Obstruction
Symptom
Oster single-serve coffee maker does not puncture or pierce the coffee pod properly, causing no or slow flow.
Pod Piercing Needle / Holder Obstruction
Symptom
Oster single-serve coffee maker drips slowly or takes an unusually long time to brew a cup.
Restricted Flow in Single-Serve Circuit
Symptom
Warming plate does not heat or keep coffee warm after brewing.
Warming Plate Heating Failure
Symptom
Warming plate stays on continuously or overheats, even when the coffee maker is turned off.
Stuck Relay / Shorted Warming Plate Circuit
Symptom
Water or coffee leaks from around the top of the carafe or filter basket during brewing.
Overflow / Brew Basket Drain Restriction
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| ADD WATER |
Display shows ADD WATER or a water droplet icon and brewing will not start.
|
Low Water Level Detection / Reservoir Not Seated | View Details |
| CLEAN |
The CLEAN indicator light stays on or flashes and the coffee maker beeps, sometimes refusing to start a normal brew.
|
Descale / Cleaning Cycle Required | View Details |
| E1 |
Display shows E1 and brewing will not start or stops immediately on Oster programmable coffee maker.
|
Temperature Sensor (NTC Thermistor) Fault | View Details |
| E2 |
Display shows E2 and the coffee maker will not heat or brew.
|
Overheat / Thermal Fuse or High-Temperature Cutoff Fault | View Details |
| E3 |
Display shows E3 and brewing stops shortly after starting on Oster digital coffee maker.
|
Water Level / Flow Detection Fault | View Details |
| E4 |
Display shows E4 and the coffee maker beeps and refuses to start brewing.
|
Carafe / Drip-Stop Switch Fault | View Details |
| E5 |
Display shows E5 and the unit will not power on fully or respond to buttons.
|
Control Board / Keypad Communication Fault | View Details |
| ERR |
Display shows ERR and the coffee maker beeps, with no brewing function.
|
General Control Error / Firmware Fault | View Details |
| HOT |
Display shows HOT or a hot surface icon and the unit will not start a new brew cycle immediately after finishing one.
|
Overtemperature Lockout / Brew Interlock | View Details |
| NO CARAFE |
Display shows NO CARAFE or a carafe icon and the unit will not start brewing.
|
Carafe Presence Detection Fault | View Details |
| – |
Auto-brew (programmed start) does not work, but manual brewing works fine.
|
Programming / Timer Logic Fault | View Details |
| – |
Brewed coffee has a burnt or bitter taste.
|
Over-Extraction / Overheating | View Details |
| – |
Brewed coffee has a metallic or rusty taste.
|
Metallic Contamination / Corrosion | View Details |
| – |
Brewed coffee has a plastic or chemical taste, especially on a newer Oster coffee maker.
|
Residue / Manufacturing Oils in Water Path | View Details |
| – |
Brewed coffee is weak or watery even when using normal amounts of coffee.
|
Under-Extraction / Short Brew Time | View Details |
| – |
Built-in grinder runs but no ground coffee reaches the filter basket.
|
Grinder Chute Blockage | View Details |
| – |
Buttons on the control panel are unresponsive or only work intermittently.
|
Keypad / Membrane Switch Failure | View Details |
| – |
Coffee maker does not power on at all; no lights or display on Oster digital coffee maker.
|
No Power / Dead Unit | View Details |
| – |
Coffee maker emits a burning smell during operation.
|
Overheating / Electrical Insulation Breakdown | View Details |
| – |
Coffee maker emits a moldy or musty odor during brewing.
|
Microbial Growth in Water Path | View Details |
| – |
Coffee maker leaks water from the bottom during or after brewing.
|
Internal Leak in Water Circuit | View Details |
| – |
Coffee maker makes loud gurgling, popping, or banging noises during brewing.
|
Air in Water Lines / Scale-Induced Boiling Noise | View Details |
| – |
Coffee maker overflows the filter basket, spilling grounds into the carafe.
|
Brew Flow Imbalance / Overfilling | View Details |
| – |
Coffee maker starts brewing but stops mid-cycle, leaving water in the reservoir.
|
Intermittent Heating / Thermal Cutout Tripping | View Details |
| – |
Display and lights flicker or dim when the coffee maker is brewing.
|
Voltage Drop / High Current Draw | View Details |
| – |
Display clock loses time or resets frequently on Oster programmable coffee maker.
|
Unstable Low-Voltage Power / Memory Retention Issue | View Details |
| – |
Display is very dim or completely blank, but the coffee maker still brews when buttons are pressed.
|
Display Backlight / LCD Failure | View Details |
| – |
Oster coffee maker powers on but will not start brewing when the BREW button is pressed.
|
Brew Start Interlock / Control Logic Fault | View Details |
| – |
Oster coffee maker shuts off immediately or within a few minutes of starting a brew cycle.
|
Power Interruption / Overcurrent Protection | View Details |
| – |
Oster coffee maker turns on and makes clicking sounds, but no water flows and no coffee is brewed.
|
No Water Flow / Blocked Heating Tube | View Details |
| – |
Oster coffee maker with built-in grinder does not grind beans or makes a loud humming noise without grinding.
|
Grinder Motor / Burr Obstruction | View Details |
| – |
Oster single-serve coffee maker does not puncture or pierce the coffee pod properly, causing no or slow flow.
|
Pod Piercing Needle / Holder Obstruction | View Details |
| – |
Oster single-serve coffee maker drips slowly or takes an unusually long time to brew a cup.
|
Restricted Flow in Single-Serve Circuit | View Details |
| – |
Warming plate does not heat or keep coffee warm after brewing.
|
Warming Plate Heating Failure | View Details |
| – |
Warming plate stays on continuously or overheats, even when the coffee maker is turned off.
|
Stuck Relay / Shorted Warming Plate Circuit | View Details |
| – |
Water or coffee leaks from around the top of the carafe or filter basket during brewing.
|
Overflow / Brew Basket Drain Restriction | View Details |
No matching codes found
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