Quick answer: Before anything else, check that the basket or drawer is pushed in fully and clicked shut. Most air fryers have a safety switch and simply won’t start otherwise. Then check the socket with another appliance, reset the air fryer by unplugging it for a few minutes, and make sure you’ve set both a temperature and a time. If it powers on but doesn’t heat, or it trips your electrics, stop using it and contact the manufacturer.
An air fryer that won’t turn on or won’t heat is frustrating, but most of the time the cause is simple and you can fix it yourself in a few minutes. This guide walks through the checks in order, from the most common causes to the ones that need a repair or replacement, and explains when it’s no longer safe to keep trying.
If Your Air Fryer Won’t Turn On
1. Check the basket or drawer
Most air fryers have a safety switch that stops them running unless the drawer is fully closed. Pull it out and push it back in firmly until it clicks. Check that nothing is stopping it closing: a basket handle not seated properly, a liner sticking up, food caught at the back, or a bent rail.
2. Check the plug and socket
Plug a lamp or phone charger into the same socket to check it works. Try a different socket on another circuit. Avoid extension leads and multi-way adaptors, as air fryers draw a lot of power and some leads can’t handle it.
3. Check the plug fuse
UK plugs have a fuse, usually 13A for an air fryer. If it has blown, the appliance won’t get power. Replace it with the same rating (check the manual). If the new fuse blows straight away, there’s a fault: stop using the air fryer.
4. Reset it
Unplug the air fryer for 5–10 minutes, then plug it back in. This resets the control board on digital models.
5. Check the controls
Many digital models need you to press the power button, then choose a programme or set a temperature and time, then press start. Some have a child lock that is turned off by holding a button combination for a few seconds; check your manual. On dial models, the timer has to be set for the heater to switch on.
6. Let it cool down
If it switched itself off after a long cook, it may have triggered its thermal cut-out to prevent overheating. Leave it unplugged to cool completely for 30 minutes, check the air vents at the back aren’t blocked, and try again.
If It Turns On but Won’t Heat
- The fan runs but there’s no heat: the heating element, thermostat or thermal fuse may have failed. These are internal faults that need a repair.
- It heats only a little: check that you’ve selected the right temperature and that a “keep warm” or “dehydrate” mode isn’t selected.
- Food is taking much longer than usual: an overloaded basket, food that’s very cold or frozen, or a build-up of grease on the element can all slow cooking. Clean the element (see our cleaning guide) and cook smaller batches.
- The display works but the element stays dark: try a reset. If nothing changes, contact the manufacturer.
If It Stops Mid-Cook
Air fryers often pause when you pull the drawer out to shake food, and some need you to press start again when it goes back in. If it cuts out without being opened, it may be overheating because the vents are blocked or it’s too close to the wall; leave at least 10–15cm of space around it. Repeated cut-outs are a sign of a fault.
Error Codes
Error codes differ by brand, but common ones point to a sensor fault, the drawer not being detected, or overheating. Look up the exact code in your manual or on the manufacturer’s website before trying anything else. Codes that point to a sensor or element fault usually need a repair.
Warranty, Repairs and Replacement
Most air fryers come with a one- or two-year manufacturer’s warranty, and many brands offer an extra year if you register the product. In the UK, the Consumer Rights Act 2015 also gives you rights if a product develops a fault that was present when you bought it: you’re entitled to a repair or replacement, and in the first six months the retailer generally has to prove the fault wasn’t there at the start. Keep your receipt, and contact the retailer or manufacturer before opening the appliance, which can void the warranty.
It’s also worth checking whether your model has been recalled. Manufacturers and the UK Office for Product Safety and Standards publish product safety notices, and registering your appliance means you’ll be told directly.
When to Stop Using It
Stop using the air fryer and unplug it if you notice any of these:
- A burning plastic or electrical smell, sparks or black smoke.
- The plug, cable or socket feels hot or looks scorched.
- It trips your electrics or blows fuses.
- The casing is cracked or melted.
Smoke with a fried smell is different and is usually just grease; see why is my air fryer smoking.
Frequently Asked Questions
Is it safe to keep trying if it won’t turn on?
It’s safe to try the simple checks: drawer, socket, fuse, reset and controls. If it still doesn’t work, or there’s any sign of burning, sparks or heat at the plug, stop and contact the manufacturer.
Could it be the socket, not the air fryer?
Yes, quite often. Test the socket with another appliance, and avoid using extension leads with an air fryer.
Should I try to fix it myself if it’s out of warranty?
Only simple fixes like replacing the plug fuse. Air fryers contain mains wiring and parts that get very hot, so internal repairs should be done by a qualified repairer. For a low-cost model, replacement is often more practical.
Why does my air fryer turn on then off?
The drawer may not be fully engaged, it may be overheating, or the control board may need resetting. Check the drawer, give it space to vent and unplug it for 10 minutes.
How long should an air fryer last?
With regular cleaning, most last several years. Grease build-up and damaged non-stick coatings are the main things that shorten their life.
