Ultima Cosa
Ultima Cosa Air Fryers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Air fryer will not start and displays E1 on the control panel.
NTC Temperature Sensor Open Circuit
E2
Air fryer beeps and shows E2 shortly after starting a cooking cycle.
NTC Temperature Sensor Short Circuit
E3
Display shows E3 and the air fryer stops heating during a cook cycle.
Overtemperature Protection Triggered (High Temp Fault)
E4
Air fryer displays E4 and will not start a cooking program.
Overheat or Thermal Fuse Open (Safety Cutout)
E5
E5 appears on the display and the unit shuts off or never heats.
Heater Circuit Fault / Relay Failure
E6
E6 error appears and the fan does not run or runs intermittently.
Fan Motor Circuit Fault
E7
E7 shows on the display and the unit will not start or stops mid-cycle.
Door/Basket Safety Switch Fault
E8
E8 error appears and the display or touch panel behaves erratically or is unresponsive.
Touch Control Panel Communication Error
E9
E9 is displayed and the unit shuts down shortly after starting.
Internal Overcurrent / Power Supply Fault
F1
F1 appears and the unit beeps continuously until unplugged.
Internal Control Board Fault (Self-Test Failure)
F2
F2 error appears when setting time or temperature; controls may freeze.
Keypad / Encoder Fault
F3
F3 appears and the unit will not heat; fan may still run.
Heater Drive Circuit Error
F4
F4 error appears intermittently, often when the unit is hot.
Temperature Sensor Drift / Calibration Error
H1
Display shows H1 and the unit does not heat properly.
Low Temperature Detected / Preheat Timeout
H2
H2 appears and the unit stops heating mid-cycle.
High Temperature Lockout / Overheat Protection
P1
P1 flashes and the unit will not start; sometimes accompanied by beeping.
Input Power Voltage Error (Low or High Line Voltage)
P2
P2 error appears when trying to start a program with the basket removed.
Basket Not Detected / Safety Interlock Active
Symptom
Air fryer does not power on at all; no lights or display.
No Power / Dead Unit
Symptom
Air fryer heats but fan does not run; food burns on top and cooks unevenly.
Convection Fan Not Operating
Symptom
Air fryer runs but does not heat; fan blows only cool air.
No Heat / Open Heater Circuit
Symptom
Air fryer trips the household circuit breaker or GFCI when starting.
Short Circuit / Ground Fault
Symptom
Basket coating is peeling or flaking off.
Non-Stick Coating Degradation
Symptom
Basket drawer is difficult to insert or remove; may scrape or jam.
Mechanical Drawer Misalignment
Symptom
Burning smell or smoke from the unit during use (not just food smoke).
Overheating / Electrical or Grease Burn
Symptom
Buttons on the touch panel respond intermittently or require very hard presses.
Touch Panel Sensitivity / Contact Wear
Symptom
Condensation or water droplets forming around the control panel or on the counter.
Steam Management / Condensation
Symptom
Display shows incorrect time or temperature compared to settings.
Control Calibration / Display Error
Symptom
Display works but is very dim or flickers during operation.
Display Power / Backlight Issue
Symptom
High-pitched squealing noise when the fan is running.
Fan Motor Bearing Wear
Symptom
Loud rattling or grinding noise during operation from the top of the unit.
Fan Assembly Mechanical Noise
Symptom
Oil or grease leaking from the bottom of the unit onto the counter.
Grease Leakage / Drip Management Failure
Symptom
Timer counts down but temperature never reaches the set point; food undercooked.
Underheating / Temperature Regulation Fault
Symptom
Unit beeps repeatedly without any user input; may start or stop on its own.
Phantom Touch / Control Panel Ghosting
Symptom
Unit emits a strong plastic or chemical odor even after several uses.
Off-Gassing / Residual Manufacturing Oils
Symptom
Unit is unusually loud compared to when it was new.
General Noise Increase
Symptom
Unit overheats food quickly even at low temperature settings.
Overheating / Temperature Overshoot
Symptom
Unit powers on but will not start cooking when Start button is pressed.
Start Command / Safety Interlock Not Satisfied
Symptom
Unit shuts off before the timer reaches zero; display may reset.
Unexpected Power Loss / Overheat Shutdown
Symptom
Unit smells of mold or stale odors even when not in use.
Odor Retention / Microbial Growth
Symptom
Unit vibrates excessively or moves on the countertop during operation.
Excessive Vibration
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Air fryer will not start and displays E1 on the control panel.
|
NTC Temperature Sensor Open Circuit | View Details |
| E2 |
Air fryer beeps and shows E2 shortly after starting a cooking cycle.
|
NTC Temperature Sensor Short Circuit | View Details |
| E3 |
Display shows E3 and the air fryer stops heating during a cook cycle.
|
Overtemperature Protection Triggered (High Temp Fault) | View Details |
| E4 |
Air fryer displays E4 and will not start a cooking program.
|
Overheat or Thermal Fuse Open (Safety Cutout) | View Details |
| E5 |
E5 appears on the display and the unit shuts off or never heats.
|
Heater Circuit Fault / Relay Failure | View Details |
| E6 |
E6 error appears and the fan does not run or runs intermittently.
|
Fan Motor Circuit Fault | View Details |
| E7 |
E7 shows on the display and the unit will not start or stops mid-cycle.
|
Door/Basket Safety Switch Fault | View Details |
| E8 |
E8 error appears and the display or touch panel behaves erratically or is unresponsive.
|
Touch Control Panel Communication Error | View Details |
| E9 |
E9 is displayed and the unit shuts down shortly after starting.
|
Internal Overcurrent / Power Supply Fault | View Details |
| F1 |
F1 appears and the unit beeps continuously until unplugged.
|
Internal Control Board Fault (Self-Test Failure) | View Details |
| F2 |
F2 error appears when setting time or temperature; controls may freeze.
|
Keypad / Encoder Fault | View Details |
| F3 |
F3 appears and the unit will not heat; fan may still run.
|
Heater Drive Circuit Error | View Details |
| F4 |
F4 error appears intermittently, often when the unit is hot.
|
Temperature Sensor Drift / Calibration Error | View Details |
| H1 |
Display shows H1 and the unit does not heat properly.
|
Low Temperature Detected / Preheat Timeout | View Details |
| H2 |
H2 appears and the unit stops heating mid-cycle.
|
High Temperature Lockout / Overheat Protection | View Details |
| P1 |
P1 flashes and the unit will not start; sometimes accompanied by beeping.
|
Input Power Voltage Error (Low or High Line Voltage) | View Details |
| P2 |
P2 error appears when trying to start a program with the basket removed.
|
Basket Not Detected / Safety Interlock Active | View Details |
| – |
Air fryer does not power on at all; no lights or display.
|
No Power / Dead Unit | View Details |
| – |
Air fryer heats but fan does not run; food burns on top and cooks unevenly.
|
Convection Fan Not Operating | View Details |
| – |
Air fryer runs but does not heat; fan blows only cool air.
|
No Heat / Open Heater Circuit | View Details |
| – |
Air fryer trips the household circuit breaker or GFCI when starting.
|
Short Circuit / Ground Fault | View Details |
| – |
Basket coating is peeling or flaking off.
|
Non-Stick Coating Degradation | View Details |
| – |
Basket drawer is difficult to insert or remove; may scrape or jam.
|
Mechanical Drawer Misalignment | View Details |
| – |
Burning smell or smoke from the unit during use (not just food smoke).
|
Overheating / Electrical or Grease Burn | View Details |
| – |
Buttons on the touch panel respond intermittently or require very hard presses.
|
Touch Panel Sensitivity / Contact Wear | View Details |
| – |
Condensation or water droplets forming around the control panel or on the counter.
|
Steam Management / Condensation | View Details |
| – |
Display shows incorrect time or temperature compared to settings.
|
Control Calibration / Display Error | View Details |
| – |
Display works but is very dim or flickers during operation.
|
Display Power / Backlight Issue | View Details |
| – |
High-pitched squealing noise when the fan is running.
|
Fan Motor Bearing Wear | View Details |
| – |
Loud rattling or grinding noise during operation from the top of the unit.
|
Fan Assembly Mechanical Noise | View Details |
| – |
Oil or grease leaking from the bottom of the unit onto the counter.
|
Grease Leakage / Drip Management Failure | View Details |
| – |
Timer counts down but temperature never reaches the set point; food undercooked.
|
Underheating / Temperature Regulation Fault | View Details |
| – |
Unit beeps repeatedly without any user input; may start or stop on its own.
|
Phantom Touch / Control Panel Ghosting | View Details |
| – |
Unit emits a strong plastic or chemical odor even after several uses.
|
Off-Gassing / Residual Manufacturing Oils | View Details |
| – |
Unit is unusually loud compared to when it was new.
|
General Noise Increase | View Details |
| – |
Unit overheats food quickly even at low temperature settings.
|
Overheating / Temperature Overshoot | View Details |
| – |
Unit powers on but will not start cooking when Start button is pressed.
|
Start Command / Safety Interlock Not Satisfied | View Details |
| – |
Unit shuts off before the timer reaches zero; display may reset.
|
Unexpected Power Loss / Overheat Shutdown | View Details |
| – |
Unit smells of mold or stale odors even when not in use.
|
Odor Retention / Microbial Growth | View Details |
| – |
Unit vibrates excessively or moves on the countertop during operation.
|
Excessive Vibration | View Details |
No matching codes found
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