Up to 65 dB is how loud Philips says the fan in its Airfryer can get, about the level of an average vacuum cleaner. That fan explains most of what owners hear. A heating element sits above the food, the fan drives hot air around the basket, and Philips, Breville, Instant and Ninja all describe it as loud enough to notice, both while cooking and for a while after the timer ends.
Only a few sounds mean something else. A new rattle, a fluttering or a shuffling noise points to a loose part, and dark smoke is a reason to unplug at once.
A fast fan is normal
Every air fryer has a fan, and none of the support pages treats its whirring as a fault. Philips explains that its Airfryer "has a fan inside which helps to keep its internal parts cool while the appliance is on," and that if the noise "sounds like a fan rotating very fast, this is normal." Then the figure: "This noise can be up to 65 dB (decibel), or as loud as the noise an average vacuum cleaner would make." The page names the NA555/00, NA110/00 and HD9280/91 among the models it covers.
Breville goes further on loudness. Writing about its countertop ovens with an air fry setting, it expects the fan to be heard: it "may be especially noticeable when using convection or air fry settings", and "Fan noise can be relatively loud and still fall within the normal operating range."
Why does my air fryer fan keep running after cooking?
It is cooling the appliance down. Instant, Ninja and Breville all call the run-on normal.
Instant's answer in its Vortex 6QT FAQ is the most cheerful of the three: "Yes! The fan will stay on for a few minutes to help your unit cool down and remove smoke from remaining food particles."
Ninja gives a stop point. Its UK FAQ for the DT200UK Foodi multifunction oven, which has an air fry basket, reads: "The cooling fan may continue to run even after the unit has been turned off. This is a normal function and should not be a source of concern." The fan "will stop after the temperature of the unit reaches below 35°C." Ninja's US and UK support sites returned errors to us, so this wording comes from an Internet Archive copy of the UK page dated September 7, 2025, written for an oven model sold in the UK.
Breville's fan "may continue running after the oven is turned off to help cool the appliance", with no time attached. The Philips NA110 manual asks owners to let the appliance cool "for approximately 30 minutes before you handle or clean it". That is a handling rule. It says nothing about how long the fan keeps going.
Rattling usually means something is loose
Either a basket insert is sitting loose or a part inside the fryer has come free. Philips draws the line by comparison: "If the noise is louder or different than the usual sound you hear from the fan (such as a fluttering or shuffling noise), then there is a part that is loose inside your Philips Airfryer. In this case, please contact us for further assistance."
Breville's procedure starts with the crumb tray: "Ensure the crumb tray is installed correctly. Confirm that the notch on the crumb tray is facing downward." Next, the oven should stand on a flat, stable surface with "at least 4 inches of clearance on all sides". A noise that survives both checks goes to the company: "If the sound resembles rattling rather than smooth airflow, contact Customer Support for further assistance."
The crisper plate and its rubber feet
Basket models have one more part that can sit loose. Under the crisper plate in the COSORI Pro LE are 4 rubber stoppers that "keep the crisper plate fitted to the bottom of the basket, prevent the crisper plate from directly touching the basket", and the manual says to "Only remove the rubber stoppers for cleaning purposes." It stops short of tying a missing stopper to noise. In fact none of the manuals lists a rattling basket or crisper plate as a symptom.
Dash's DCAF200 manual has a different complaint in mind, a drawer that will not slide in properly, and it blames too much food: "Do not overfill the Crisper Drawer."
Ticks and pops are metal moving
Ticking and popping while the fryer warms or cools is expansion and contraction, and Breville is the one maker that covers it: "Occasional banging or popping during temperature changes is a normal result of metal expansion and contraction."
It names the pan, the rack and the oven casing. "Different parts may heat or cool at slightly different rates, producing occasional sounds," and those sounds "may occur more frequently during seasonal changes when temperature differences are greater." The conclusion is reassuring: "No troubleshooting is typically needed for these normal heating and cooling sounds." Breville wrote all of this for countertop ovens. The basket air fryer manuals never mention ticking.
Why does my air fryer keep beeping?
Mostly to make you shake the food. Philips, COSORI and Chefman all document shake reminders, and most of these fryers also beep when preheating ends and when the cycle finishes.
"If your Philips Airfryer beeps during cooking and the time is still on, it is to remind you to shake your food," reads the Philips beep page. On the HD9285 5000 Series XL Connected, this "can happen up to 4 times during one cooking process" with the fries and frozen snack presets.
The COSORI Pro LE manual is more insistent. Halfway through, "The air fryer will beep 5 times, and (SHAKE) will blink on the display." There are 3 more beeps when preheating is done and 3 when cooking ends.
On Chefman's TurboFry Touch, "the air fryer will beep as a reminder to shake (or flip) foods as necessary." The Dash Tasti-Crisp DCAF200 is the quiet one of the group, with no shake reminder in its manual and a single end signal: "When the Air Fryer is done cooking, a chime will sound."
Turning the shake reminder off
On COSORI it takes one button: "Add or remove a Shake Reminder by pressing SHAKE." The Philips HD9285 wants a key combination. Switch the appliance on, then "long press the homemade fries preset button and the frozen potato-based snacks preset button simultaneously", and repeat it to bring the reminder back.
Philips moves the setting into a Settings menu on its 7000 Series Combi XXL Connected, where the manual mode reminder can be disabled, though the reminder in some of its Auto-Cook programs cannot be switched off at all. Chefman offers no mute. Its advice is to "simply ignore the warning, which will go off automatically after a brief period of time if basket was not pulled out."
Buzzing is normal, grinding is a support call
A low buzz or hum is fine by Breville's account: "A low buzzing or humming sound is generally considered normal." Owners who are unsure should "contact Customer Support," and "A short video recording may help the support team assess the noise."
Grinding and squealing are harder.
No air fryer manual or support page explains either one, so the safest reading is that this is the "louder or different" sound Philips sends to its support team. The nearest instructions are safety rules rather than a diagnosis. "Always make sure heater is free and no food stuck in heater," the NA110 manual warns, while Dash's troubleshooting table lists "Food is touching the heating element" as a cause of white smoke, fixed by "Remove some food from the Air Fryer".
Nobody gives a repair step for the fan or its motor. Philips is blunt about it, "Do not attempt to repair the appliance yourself", and wants the fryer returned to a service center it has authorized for examination or repair.
How loud is a normal air fryer?
The few figures out there come without a test distance or method. In our quietest air fryers guide they run from lower than 48dB on COSORI's smallest model to the up to 65 dB Philips gives for its whole range.
COSORI promises "noise levels lower than 48dB" on its Lite 2.1-Quart Mini page and "under 55dB during operation" in the Pro LE FAQ. Typhur puts its Dome 2 at 51dB. Philips's 65 dB is a different kind of number, a ceiling for the fan rather than a reading for one model. With a ceiling in one place and single numbers in another, none of these claims puts one brand ahead of another, and the decibel chart is the better place to see what 48 to 65 dB sounds like next to everyday noise.
No maker publishes a decibel line between a normal fryer and a faulty one. The test they use is change, and Philips frames it as a sound that is "louder or different" than usual.
When to stop using it
Three signs: dark smoke, damage, or a new rattle or loose-sounding part. COSORI, Chefman and Philips each tell owners to unplug and contact them or an authorized service facility.
COSORI's rule covers smoke of both colors: "Immediately turn off and unplug your air fryer if you see dark smoke coming out. White smoke is normal, caused by heating fat or food splashing, but dark smoke means that food is burning or there is a circuit problem."
Chefman is just as direct. "In the rare case that you see black smoke coming from the unit, immediately unplug fryer, contact customer service, and do not use the fryer until issue is resolved."
Damage is the other stop sign. "Do not use your air fryer if it is damaged, not working, or if the cord or plug is damaged," the COSORI manual reads. Philips rules out operating an appliance "after the appliance malfunctions or has been damaged in any manner", and its instruction after that is to "Return appliance to the nearest authorized service facility for examination, repair, or adjustment."
White smoke and steam sit on the normal lists. A new appliance "may produce some smoke when you use it for the first time," according to Philips; Instant counts steam from frozen foods as normal; and white smoke from greasy food "does not affect the appliance or the end result," in the Dash manual.
Other kitchen noise pages
For a quieter replacement, the quietest air fryers guide lists each dB claim in the maker's wording. The quietest microwaves guide does the same for the other countertop heater most kitchens run every day.
Microwaves share several of these sounds, including a cooling fan that runs on and beeps that repeat, and microwave noises explained and how to make a microwave quieter deal with them. A kitchen that opens onto a lounge is the subject of our open-plan kitchen page, and a machine that has grown louder with age is covered in why your appliance got louder.
Gourmia, Ultrean and the Breville caveat
Two makers are missing. Gourmia's manual site showed a bot check, and we found no Ultrean manual on an Ultrean site, so neither is quoted. Breville's lines come from its countertop oven article rather than a basket fryer manual. Every quote here was checked on November 11, 2026.
