Air Fryer
E3
The E3 error code on a Tower air fryer indicates an overheating fault — specifically that the appliance has detected an abnormally high internal temperature. It’s a safety-triggered shutdown, so don’t ignore it, but in most cases it’s straightforward to resolve at home.
What does this error mean?
The E3 code means your Tower air fryer’s internal temperature sensor (thermistor) has detected heat beyond the safe operating threshold. The appliance cuts power automatically to prevent damage to internal components or a potential fire. This is a protective feature, not a sign the unit is necessarily broken — but the underlying cause needs addressing before you use it again.
Est. repair cost
£50–£90 professional repair; thermistor part alone £5–£15 if sourced independently (professional fitting recommended)
🔍 Likely causes
🛠️ Step-by-step fix
Switch off and unplug immediately. Leave the air fryer to cool on a flat, open surface for at least 30 minutes — do not attempt to restart it while warm.
Check the air vents (usually on the rear and underside). Clear any visible grease or debris with a soft brush or dry cloth. Ensure the unit has at least 10cm of clear space on all sides.
Remove the basket and drawer, and wash them thoroughly. Grease-clogged accessories trap heat inside the cooking chamber. Allow all parts to dry completely before reassembling.
Plug back in and test with a small, lightly-filled basket. Run a short 5-minute cycle at a moderate temperature (180°C). If E3 returns immediately, the thermistor or heating element is likely faulty.
If the error only appears after extended cooking, try splitting long sessions into shorter 20–25 minute cycles with a 10-minute rest between them to let the unit breathe.
If E3 persists after all the above steps, do not attempt to open the appliance casing. Contact Tower’s UK customer support (0345 074 2744) to check warranty status, or arrange a repair.
📞 When to call a professional
If the E3 error returns every time you use the appliance despite clean vents and a half-filled basket, the thermistor or heating element likely needs professional replacement — these require opening the sealed electrical casing, which is not a safe DIY job. When contacting a repairer, tell them: ‘My Tower air fryer displays E3 on startup or mid-cycle — I suspect a thermistor or heating element fault.’ Check your warranty first; Tower offers a standard 2-year guarantee on most models.
⚖️ Repair or replace?
A professional repair involving a thermistor or heating element replacement typically costs £50–£90 including labour at an appliance repair shop. If your Tower air fryer is under 2 years old, claim on the warranty before spending anything. For units over 3 years old, weigh that repair cost against a new Tower air fryer (£40–£120 depending on model) — replacement often makes more financial sense unless it’s a premium model.