Safety first: Unplug the air fryer before opening the housing. Do not insert objects into the fan while it is running.

Step-by-step checks:

Identify noise source: Start a short cycle and listen carefully to locate whether the noise is from the top, rear, or base. Stop and unplug.
Inspect fan area: Remove the rear or top cover to access the fan. Look for loose screws, foil, or food pieces caught in the blades.
Tighten fan nut/screw: Many GoWISE USA models use a nut or screw to secure the fan to the motor shaft. Hold the fan and gently tighten the fastener.
Check motor bearings: Spin the fan by hand. If you feel roughness or hear grinding, the motor bearings are worn and the motor should be replaced.
Check other hardware: Inspect internal brackets, heater mounts, and panel screws for looseness and tighten as needed.

When to stop: If noise persists after tightening and cleaning, or if the motor is clearly failing, replace the convection fan motor assembly.

Loud rattling, grinding, or scraping noise during operation, especially when the fan is running.

Possible Causes