Air Fryer
E5
The E5 error code on a Cosori air fryer indicates a temperature sensor fault — specifically that the appliance is detecting an abnormally high internal temperature. It’s a safety cut-out, not a minor glitch, so don’t ignore it.
What does this error mean?
The E5 code means your Cosori air fryer’s NTC (negative temperature coefficient) thermistor has detected that the internal temperature has exceeded safe operating limits, or the sensor itself has failed and is sending a faulty reading. The appliance shuts itself down to prevent overheating damage or a fire risk. Until the root cause is resolved, the fryer will refuse to operate normally.
Est. repair cost
£50–£90 professional repair; £8–£20 for a replacement NTC thermistor if a qualified technician sources the part separately
🔍 Likely causes
🛠️ Step-by-step fix
Power off and unplug the air fryer, then leave it to cool completely for at least 30 minutes before doing anything else.
Check the vents — usually on the rear and underside — and clear any dust, grease, or debris blocking them using a dry brush or cloth.
Reposition the unit so it has at least 10–15 cm of clear space on all sides and behind it, away from walls, cabinets, and other appliances.
Remove the basket and drawer, then clean the inside of the cooking chamber thoroughly with a damp cloth and mild washing-up liquid to remove any grease build-up.
Once cool and clean, plug back in and run a short test cook (5 minutes at 180°C). If E5 clears, the issue was heat build-up or airflow.
If E5 returns immediately or persists after cleaning, the NTC temperature sensor is likely faulty — do not attempt to open the main unit yourself; this requires a professional repair.
📞 When to call a professional
If the E5 error reappears after the unit has fully cooled and vents have been cleared, the internal temperature sensor or heating element is likely defective and needs professional diagnosis. Contact Cosori UK customer support first (0800 numbers or via their website) as many units may still be under the standard 2-year UK warranty. When calling a repair technician, tell them: ‘My Cosori air fryer is displaying an E5 error — I believe it’s a temperature sensor or thermistor fault.’
⚖️ Repair or replace?
A professional repair for a faulty NTC sensor or heating element typically costs £50–£90 in the UK including labour. Cosori air fryers range from £60 to £180 new, so if yours is over 2–3 years old and out of warranty, replacement is often the more cost-effective choice. If the unit is under 2 years old, assert your right to repair or replacement under UK consumer law (Consumer Rights Act 2015) before paying for any repair.