Air Fryer
E2
The E2 error code on a Breville air fryer points to a temperature sensor fault — specifically, the appliance has detected that its internal thermistor (the component that monitors cooking temperature) is either reading an abnormally high temperature or has failed entirely. In most cases it’s not a death sentence for your air fryer, and there are several safe steps you can try yourself before spending a penny. This guide walks you through exactly what’s causing it, what you can fix at home, and when it’s time to call in some help.
What does this error mean?
The E2 error code on Breville air fryers is a thermal sensor error. Your air fryer has a small electronic component called a thermistor (sometimes referred to as a temperature probe or NTC sensor) which constantly monitors the air temperature inside the cooking chamber. When the appliance’s control board receives a reading from that sensor that is outside its expected range — either suspiciously high, suspiciously low, or no reading at all — it shuts everything down and displays E2 as a safety precaution. Think of it as the air fryer saying: ‘I can’t tell how hot it is in here, so I’m refusing to operate.’ This is actually a sensible safety feature — running an air fryer blind to its own temperature could cause overheating or a fire. The E2 code is specific to the temperature monitoring circuit, which distinguishes it from other error codes like E1 (general electrical fault) or E3 (overheating cut-out).
Est. repair cost
DIY thermistor replacement: £8–£25 for the part. Professional repair (thermistor or wiring): £50–£90. Professional repair (PCB fault): £80–£150.
🔍 Likely causes
🛠️ Step-by-step fix
Step 1 — Power off and unplug completely: Switch off the air fryer at the socket and unplug it from the wall. Do not just press the power button — fully disconnecting from the mains is essential before you do anything else. Leave it unplugged for at least 10–15 minutes to allow all internal components to cool down fully.
Step 2 — Check your placement and ventilation: While you wait, examine where the air fryer is positioned. There should be at least 10–15 cm of clear space on all sides and above the unit. If it’s tucked under a cabinet, pushed against a wall, or sitting on a cluttered worktop, move it to a more open spot. Poor ventilation is one of the most common triggers for E2.
Step 3 — Clean the exterior vents: Using a dry cloth or a soft brush (an old toothbrush works well), gently clear any visible grease, dust, or debris from the ventilation grilles on the back and underside of the unit. Do not use water near any vent openings.
Step 4 — Thoroughly clean the cooking chamber: Remove the basket and drawer, and wash them as normal. Then, using a damp cloth with a small amount of washing-up liquid, carefully wipe down the inside walls of the cooking chamber, paying particular attention to the heating element area at the top. Grease build-up around the thermistor sensor (usually a small probe visible near the heating coil) can cause false readings. Do not spray water directly inside the unit — use a wrung-out cloth only. Allow everything to dry completely for at least 30 minutes before the next step.
Step 5 — Perform a hard reset: Plug the air fryer back in, turn it on, and check whether the E2 code has cleared. If it has, run a short test cycle (5 minutes at 180°C with the empty basket) and monitor whether the error returns. A one-off glitch is common and a reset often resolves it permanently.
Step 6 — Check for signs of physical damage to the sensor: If the error persists, look inside the cooking chamber at the top — you should see a small metal probe or wire sensor near the heating element. Without touching the heating element or any electrical parts, check visually for any obvious damage: a burnt or discoloured probe, a wire that appears melted or detached, or heavy carbon deposits. If you see clear damage, this confirms a faulty thermistor and you’ll need a replacement part or professional repair.
Step 7 — Search for your specific Breville model’s replacement thermistor: Breville air fryer thermistors (NTC sensors) are available from UK appliance parts suppliers such as eSpares, 4WhitGoods, or Breville’s own spares line. You’ll need your model number (usually printed on a sticker on the base of the unit). NTC sensors for Breville air fryers typically cost £8–£25. This is only a DIY-safe repair if you are comfortable with basic appliance maintenance — it involves removing the outer casing to access the wiring.
Step 8 — If you are NOT comfortable opening the appliance, stop here: Do not attempt to open the main body of the air fryer or access the PCB or internal wiring yourself. Doing so can void any remaining warranty, and incorrectly reconnecting components creates a fire or electric shock risk. This is the point at which you should book a repair or consider the advice in the sections below.
Step 9 — Contact Breville UK support before spending money on parts: Breville UK has a customer support line and a useful online fault diagnosis tool. If your appliance is under two years old, you may have rights under the UK Consumer Rights Act 2015 — the fault may be repaired or the unit replaced free of charge if deemed a manufacturing defect. Check your purchase date before paying for anything.
📞 When to call a professional
You should stop DIY attempts and contact a qualified appliance repair engineer if: the E2 error returns immediately after a full reset and clean; you can see visible damage to the thermistor probe, wiring, or any internal component; the air fryer makes unusual sounds (buzzing, crackling) or emits a burning smell at any point; or the fix requires accessing the internal PCB or wiring harness. When you call, tell them: ‘My Breville air fryer is displaying an E2 error code, which I understand relates to the temperature sensor or thermistor. I’ve already unplugged it, cleaned the cooking chamber and vents, performed a hard reset, and the error persists.’ This tells the engineer exactly what’s been ruled out and saves time. For appliances still within their two-year warranty period, contact Breville UK directly first on 0345 130 6580 — you may be entitled to a free repair or replacement under UK consumer law without needing a third-party engineer.
⚖️ Repair or replace?
Here’s the honest breakdown for UK homeowners: if your Breville air fryer is less than two years old, pursue your consumer rights first — a repair or replacement should cost you nothing. If it’s two to four years old and the fault is confirmed as a faulty thermistor, a DIY part costs £8–£25 and the repair is achievable if you’re practically minded. A professional repair (callout plus labour plus part) will typically run £50–£90, which is borderline for a budget air fryer but reasonable for a mid-range or large-capacity Breville model. If the fault lies with the main PCB rather than just the thermistor, professional repair costs rise to £80–£150 — at which point, for most Breville air fryers retailing at £60–£130, replacement starts to make more financial sense. If your air fryer is over four years old or was a budget model under £60, replacement is almost certainly the better value decision. Breville air fryers have good parts availability in the UK, which is a point in favour of repair compared to some lesser-known brands.