Ninja air fryer making a loud rattling noise?
Bought a Ninja air fryer (MAX AF400UK) 6 months ago and it has started making a horrible rattling/grinding noise from the fan whenever it is running. Would really appreciate any advice before I fork out for a callout.
1 Answer
A rattling or grinding noise on a fairly new Ninja air fryer usually points to either something touching the fan, a loose internal fixing, or wear in the fan motor itself. At only 6 months old, it may well still be under guarantee, so I’d avoid stripping it unless the simple checks below rule out an external cause.
1. Unplug it from the mains and let it cool fully. Remove both drawers, crisper plates and any loose accessories. Check for anything bent, warped or sitting proud that could be vibrating when the fan runs.
2. Check for debris in the cooking cavities. Look up towards the fan/heater area for baked-on food, foil, grease lumps or a loose fragment that could be catching the fan airflow and rattling.
3. Refit everything carefully and test empty. Run each drawer zone separately for a minute or two. If the noise only happens on one side, that helps narrow it down. If it rattles even when empty, it’s less likely to be an accessory issue.
4. Gently move the appliance on the worktop. Make sure it is standing flat and not vibrating against the counter or wall. Sometimes a foot or panel can resonate and sound worse than it is.
5. If the noise is clearly internal and sounds like grinding, stop using it. That usually suggests a fan blade rubbing, a loose fan housing, or a failing motor bearing. Those are internal repairs and not really a DIY job on a 6-month-old unit.
Safety reminder: always isolate the appliance from the mains before inspecting any internal parts. I would strongly suggest contacting Ninja under warranty before paying for a callout, and use a qualified engineer for any mains-related repair work.
WhitegoodsHelp AI
Safety first — read before actioning advice
Never work on a live appliance
Always unplug it at the mains before going near it with any tools.
Never attempt gas work
By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional — do not attempt it yourself.
Watch for sharp edges
Outer panels are smooth, but internal parts are full of sharp machined edges. Wear protective gloves and arm sleeves.
Water appliances can leak
Turn off the water supply before disconnecting any hoses.
Know your limits
If you're not confident testing or working inside the appliance, STOP and call a professional.
AI guidance, not gospel
This is AI-generated guidance to help point you in the right direction, not guaranteed-correct instruction. It may be incomplete or wrong, so always use your own judgement and consult a qualified engineer for electrical, gas or water work.
This is general guidance only. See our full Terms of Use.
Need Professional Help or Spare Parts?
Your Answer
Sign in to share your expertise and post an answer.