Cosori Multicookers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Display shows E1, and the cooker will not start or stops shortly after pressing Start.
Bottom Temperature Sensor (NTC) Open Circuit
E2
Display shows E2, and the cooker will not heat or immediately cancels the program.
Bottom Temperature Sensor (NTC) Short Circuit / Over-range
E3
Display shows E3 during preheat or cooking; the unit stops heating and beeps.
Over-temperature Protection Triggered (Bottom Plate Overheat)
E4
Display shows E4, and the cooker will not start or stops mid-cycle.
Top Lid Temperature Sensor (NTC) Fault
E5
Display shows E5, and the unit will not pressurize or heat properly.
Pressure Sensor Circuit Fault
E6
Display shows E6, and the cooker will not start or stops during preheat.
Heating Circuit Fault / Triac or Relay Failure
E7
Display shows E7, and the cooker beeps and will not start the selected program.
Lid Lock / Lid Position Switch Fault
E8
Display shows E8, and the cooker cannot build or maintain pressure.
Abnormal Pressure Rise / Pressure Leakage Detected
E9
Display shows E9, and the cooker shuts down during cooking.
Internal Over-current / Power Supply Protection
Err
Display shows Err or ERROR, and no functions can be selected.
General Control Board / Keypad Communication Error
HOT
Display shows HOT, and the cooker will not start a new program.
Excessive Inner Pot Temperature Detected
LID
Display shows LID or a flashing lid icon; the cooker will not start a pressure program.
Lid Not Detected as Closed / Lid Position Error
noP
Display shows noP or No Pressure; the unit times out without reaching pressure.
Failure to Reach Target Pressure
OPEN
Display shows OPEN or an open-lid icon, and the unit refuses to build pressure.
Lid Open Detected During Pressure Operation
OvHt
Display shows OvHt or Overheat, and the unit stops cooking.
Overheat Protection / Dry Pot Condition
PrSE
Display shows PrSE or Pressure Sensor Error, and unit will not start.
Pressure Sensor Signal Out of Range
SE
Display shows SE or Sensor Error, and cooker will not heat.
Generic Temperature Sensor Error
U12
Display shows U12, and cooker cannot start pressure cooking.
Lid Not in Correct Position for Pressure Mode
U15
Display shows U15, and unit stops heating unexpectedly.
Abnormal Temperature Rise / Dry Burn Protection
Symptom
Burning smell during operation without visible smoke.
Overheating of Internal Components or Food Scorching
Symptom
Buttons on the control panel are unresponsive or require very hard presses.
Keypad / Touch Panel Failure
Symptom
Display is dim, flickering, or segments are missing.
LED / LCD Display Failure
Symptom
Excessive vibration or rattling during pressure cooking.
Mechanical Vibration / Unstable Placement
Symptom
Food is consistently overcooked or scorched on the bottom.
Excessive Temperature at Pot Bottom
Symptom
Food is consistently undercooked even when following recipes.
Low Temperature / Pressure Performance
Symptom
High-pitched whine or buzzing from the cooker during operation.
Electrical Noise from Power Supply or Inductive Components
Symptom
Inner pot is difficult to insert or remove; scraping or grinding noise against the heating plate.
Deformed Inner Pot or Misaligned Heating Plate
Symptom
Lid is stuck and will not open after cooking.
Residual Pressure / Mechanical Lid Lock Jam
Symptom
Liquid or foam spurting from the steam release valve during pressure release.
Foamy Food / Blocked Anti-Block Shield
Symptom
Loud clicking or popping noises from the base during heating.
Thermal Expansion or Relay Operation Noise
Symptom
Multicooker does not power on at all (no lights, no display).
No Power / Dead Control Board
Symptom
Multicooker heats but never reaches or holds pressure (steam constantly escaping from lid).
Lid Seal / Pressure Retention Failure
Symptom
Multicooker powers on but will not heat in any mode.
Open Heating Circuit
Symptom
Programs start but end prematurely without an error code.
Premature Cycle Termination / Logic Fault
Symptom
Steam leaking continuously from the float valve area even after it pops up.
Float Valve Seal Failure
Symptom
Steam leaking from around the lid handle or hinge area during pressure cooking.
Lid Assembly Leak at Handle / Hinge
Symptom
Steam release valve does not vent properly or is difficult to turn.
Steam Release Valve Obstruction / Wear
Symptom
The exterior of the cooker becomes excessively hot to the touch during operation.
Insulation / Thermal Shielding Degradation
Symptom
Unusual metallic or chemical odor from a new cooker during first uses.
Burn-in Odor / Residual Manufacturing Oils
Symptom
Visible smoke coming from vents or lid during use.
Severe Overheating or Electrical Short
Symptom
Water or condensation dripping from the sides or bottom of the cooker during use.
Condensation Management / Gutter Overflow
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Display shows E1, and the cooker will not start or stops shortly after pressing Start.
|
Bottom Temperature Sensor (NTC) Open Circuit | View Details |
| E2 |
Display shows E2, and the cooker will not heat or immediately cancels the program.
|
Bottom Temperature Sensor (NTC) Short Circuit / Over-range | View Details |
| E3 |
Display shows E3 during preheat or cooking; the unit stops heating and beeps.
|
Over-temperature Protection Triggered (Bottom Plate Overheat) | View Details |
| E4 |
Display shows E4, and the cooker will not start or stops mid-cycle.
|
Top Lid Temperature Sensor (NTC) Fault | View Details |
| E5 |
Display shows E5, and the unit will not pressurize or heat properly.
|
Pressure Sensor Circuit Fault | View Details |
| E6 |
Display shows E6, and the cooker will not start or stops during preheat.
|
Heating Circuit Fault / Triac or Relay Failure | View Details |
| E7 |
Display shows E7, and the cooker beeps and will not start the selected program.
|
Lid Lock / Lid Position Switch Fault | View Details |
| E8 |
Display shows E8, and the cooker cannot build or maintain pressure.
|
Abnormal Pressure Rise / Pressure Leakage Detected | View Details |
| E9 |
Display shows E9, and the cooker shuts down during cooking.
|
Internal Over-current / Power Supply Protection | View Details |
| Err |
Display shows Err or ERROR, and no functions can be selected.
|
General Control Board / Keypad Communication Error | View Details |
| HOT |
Display shows HOT, and the cooker will not start a new program.
|
Excessive Inner Pot Temperature Detected | View Details |
| LID |
Display shows LID or a flashing lid icon; the cooker will not start a pressure program.
|
Lid Not Detected as Closed / Lid Position Error | View Details |
| noP |
Display shows noP or No Pressure; the unit times out without reaching pressure.
|
Failure to Reach Target Pressure | View Details |
| OPEN |
Display shows OPEN or an open-lid icon, and the unit refuses to build pressure.
|
Lid Open Detected During Pressure Operation | View Details |
| OvHt |
Display shows OvHt or Overheat, and the unit stops cooking.
|
Overheat Protection / Dry Pot Condition | View Details |
| PrSE |
Display shows PrSE or Pressure Sensor Error, and unit will not start.
|
Pressure Sensor Signal Out of Range | View Details |
| SE |
Display shows SE or Sensor Error, and cooker will not heat.
|
Generic Temperature Sensor Error | View Details |
| U12 |
Display shows U12, and cooker cannot start pressure cooking.
|
Lid Not in Correct Position for Pressure Mode | View Details |
| U15 |
Display shows U15, and unit stops heating unexpectedly.
|
Abnormal Temperature Rise / Dry Burn Protection | View Details |
| – |
Burning smell during operation without visible smoke.
|
Overheating of Internal Components or Food Scorching | View Details |
| – |
Buttons on the control panel are unresponsive or require very hard presses.
|
Keypad / Touch Panel Failure | View Details |
| – |
Display is dim, flickering, or segments are missing.
|
LED / LCD Display Failure | View Details |
| – |
Excessive vibration or rattling during pressure cooking.
|
Mechanical Vibration / Unstable Placement | View Details |
| – |
Food is consistently overcooked or scorched on the bottom.
|
Excessive Temperature at Pot Bottom | View Details |
| – |
Food is consistently undercooked even when following recipes.
|
Low Temperature / Pressure Performance | View Details |
| – |
High-pitched whine or buzzing from the cooker during operation.
|
Electrical Noise from Power Supply or Inductive Components | View Details |
| – |
Inner pot is difficult to insert or remove; scraping or grinding noise against the heating plate.
|
Deformed Inner Pot or Misaligned Heating Plate | View Details |
| – |
Lid is stuck and will not open after cooking.
|
Residual Pressure / Mechanical Lid Lock Jam | View Details |
| – |
Liquid or foam spurting from the steam release valve during pressure release.
|
Foamy Food / Blocked Anti-Block Shield | View Details |
| – |
Loud clicking or popping noises from the base during heating.
|
Thermal Expansion or Relay Operation Noise | View Details |
| – |
Multicooker does not power on at all (no lights, no display).
|
No Power / Dead Control Board | View Details |
| – |
Multicooker heats but never reaches or holds pressure (steam constantly escaping from lid).
|
Lid Seal / Pressure Retention Failure | View Details |
| – |
Multicooker powers on but will not heat in any mode.
|
Open Heating Circuit | View Details |
| – |
Programs start but end prematurely without an error code.
|
Premature Cycle Termination / Logic Fault | View Details |
| – |
Steam leaking continuously from the float valve area even after it pops up.
|
Float Valve Seal Failure | View Details |
| – |
Steam leaking from around the lid handle or hinge area during pressure cooking.
|
Lid Assembly Leak at Handle / Hinge | View Details |
| – |
Steam release valve does not vent properly or is difficult to turn.
|
Steam Release Valve Obstruction / Wear | View Details |
| – |
The exterior of the cooker becomes excessively hot to the touch during operation.
|
Insulation / Thermal Shielding Degradation | View Details |
| – |
Unusual metallic or chemical odor from a new cooker during first uses.
|
Burn-in Odor / Residual Manufacturing Oils | View Details |
| – |
Visible smoke coming from vents or lid during use.
|
Severe Overheating or Electrical Short | View Details |
| – |
Water or condensation dripping from the sides or bottom of the cooker during use.
|
Condensation Management / Gutter Overflow | View Details |
No matching codes found
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