Cosori Air Fryer E1 — What It Means & How to Fix It
E1 is Cosori's temperature-monitor open-circuit code — the thermistor or its wiring has broken open.
What this code means
Cosori air fryer manuals list E1 as an open circuit in the temperature monitor. The control can't read oven/zone temperature, so it stops rather than run blindly. It's a sensor/wiring fault, not a user error.
Cosori's user manual for the CAF-P583S-KUS says E1 means there is an open circuit in the temperature monitor and directs owners to Customer Support. Codes differ between Cosori air fryer models, so check the model number on the underside of the unit against its own manual.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Failed temperature thermistor or open wire | Common | No — technician/job |
What you can try yourself
- Turn off and unplug.
- Leave it off for 5 minutes; retry.
- If E1 returns, call Cosori Customer Support with model number — the sensor is internal.
When to call a technician
- E1 returns after reset and full cool-down.
Typical professional repair cost: Service / warranty — Cosori directs to Customer Support.
Frequently asked questions
Can I reset E1 myself?
Only power-cycle; Cosori says contact support — the sensor is internal.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Cosori codes
- Cosori Air Fryer E2 E2 is the temperature-monitor short-circuit code.
- Cosori Air Fryer E3 E3 is the overheat-protection alarm — the fryer got too hot and shut down.
- Cosori Air Fryer E4 E4 is a voltage-error alarm — the fryer detects wrong mains voltage.
- Cosori Air Fryer E12 E12 is the DC-motor failure code on newer Cosori models.
More: all Cosori air fryer codes · all Cosori codes · search by symptom