TL;DR
- Do not leave it fully unattended, especially in an enclosed cabinet.
- Main fire causes: loose paper liners and heavy grease build-up.
- Give it clearance on all sides and above for the hot exhaust.
- Never run an empty paper liner; the fan can blow it into the element.
- If you smell burning plastic or electrics, unplug it at the wall immediately.
Table of Contents
Air fryer fires make the news occasionally, which makes people nervous. The reality is that fires are rare and almost always down to a few avoidable causes. Treat an air fryer like any heating appliance and the risk is very low.
What actually causes air fryer fires
Two things top the list. First, a loose paper liner with no food on it lifts into the glowing element and ignites within seconds. Second, heavy grease that has built up over many cooks can smoke and, rarely, flare. Cooking very fatty food like bacon without cleaning between cooks raises the risk.
Can you leave it unattended?
It is best not to. Most models switch off at the end of the timer, so they will not run forever, but leaving one unsupervised in an enclosed space or near tea towels and packaging is where trouble starts. Stay in the kitchen, especially for greasy foods.
| Cause | Prevention |
|---|---|
| Loose liner ignites | Weigh liners down with food; never preheat empty |
| Grease build-up flares | Clean the drawer and element regularly |
| Trapped heat | Keep clearance on all sides and above |
| Nearby flammables | Keep tea towels, packaging and paper away |
| Electrical fault | Use a proper socket; unplug if it smells of electrics |
Safe placement matters
Give the air fryer room to breathe. The exhaust is hot, so do not tuck it under a cabinet or against a wall, and never on top of the hob. Our guide on where to put an air fryer covers clearances.
What to do if something goes wrong
If you see smoke from grease, our smoking guide explains the fix. If you smell burning plastic or electrics, or see sparks, that is a fault: unplug it at the wall and do not use it again until checked. Keep a lid or fire blanket nearby, and never throw water on an electrical fire.
Frequently asked questions
Can you leave an air fryer unattended?
It is best not to. Most switch off at the end of the timer, but you should stay nearby, especially when cooking greasy food or using liners. Never leave one running in an enclosed cabinet or near flammable items like tea towels.
Can an air fryer catch fire?
It is rare but possible. The most common causes are a loose paper liner blowing into the heating element and igniting, or a build-up of grease flaring up. Weighing liners down and cleaning regularly prevents nearly all incidents.
Is it safe to leave an air fryer on overnight?
No. Air fryers are designed for supervised, short cooking sessions, not for running unattended for hours. Leaving one on overnight is an unnecessary fire risk and should be avoided entirely.
What should I do if my air fryer catches fire?
Turn it off and unplug it at the wall if it is safe to do so. Do not open the drawer, which feeds the fire oxygen, and never throw water on an electrical fire. Smother it with a fire blanket or use the correct extinguisher, and call emergency services if needed.
Why does my air fryer smell like burning?
A food or grease smell usually means grease on the heating element, which you can clean off. A burning plastic or electrical smell is different and points to a fault, so unplug it at the wall and stop using it.