Air Fryer
E4
The E4 error code on a Salter air fryer indicates an overheating fault — the internal temperature has exceeded safe operating limits. It’s a safety cut-out, so you should stop using the appliance immediately until the issue is resolved.
What does this error mean?
The E4 code means the air fryer’s thermal sensor has detected that the internal temperature is dangerously high — typically above 260°C, depending on the model. The appliance has automatically shut down to prevent a fire or damage to internal components. This is a protective feature, not a minor glitch, so don’t simply restart and carry on without investigating the cause.
Est. repair cost
£50–£90 professional repair; £10–£25 DIY thermal sensor part if you are qualified to fit it
🔍 Likely causes
🛠️ Step-by-step fix
Switch off and unplug the air fryer immediately, then leave it to cool completely for at least 30 minutes before doing anything else.
Check the air vents on the back and underside of the unit — wipe away any grease or debris with a damp cloth, and make sure there is at least 10cm of clear space on all sides when you next use it.
Remove and clean the basket and drawer — heavy grease residue inside the cooking chamber can itself generate excess heat. Wash with warm soapy water, rinse thoroughly, and dry completely.
Plug the fryer back in, run it empty at a mid-range temperature (around 160°C) for 5 minutes, and check whether the E4 error returns. If it doesn’t, you likely had a ventilation or overload issue.
If the error returns with an empty, clean, well-ventilated fryer, the thermal sensor or heating element is likely faulty — at this point DIY repair is not recommended as it requires opening the appliance and handling electrical components.
Check your model against any Salter product recalls or firmware updates on the Salter website (salterhousewares.co.uk) — some batch faults have been acknowledged by the manufacturer.
📞 When to call a professional
If the E4 error persists after cleaning the vents, reducing the food load, and performing a full cool-down reset, the fault is almost certainly internal — a failed thermal sensor, heating element, or control board. Do not attempt to open the appliance yourself; this involves mains-voltage electrical components and requires a qualified appliance repair technician. When you call, tell them: ‘My Salter air fryer is showing a persistent E4 overheating error that doesn’t clear after a reset and full cool-down.’
⚖️ Repair or replace?
A professional repair for a faulty sensor or heating element on a Salter air fryer typically costs £50–£90 in labour alone, which is often close to or more than the cost of a new mid-range Salter air fryer (£40–£90 new). If your fryer is over 2 years old or out of warranty, replacement is almost always the more economical choice. If it’s under 2 years old, first check your consumer rights under the Consumer Rights Act 2015 — Salter may be obliged to repair or replace it free of charge.