Describe the sound and when it starts
A rattle at one speed, a hum without airflow and a scraping sound as the fan slows are different descriptions. Note the speed and whether the sound begins immediately or develops after use. Use observations already available rather than repeatedly running a noisy appliance.
A short recording from a safe position can supplement the description, but it cannot prove which component failed. Keep phones, hair and clothing away from the filter opening and hot cooking surfaces. Stop instead of recording if the hood shakes strongly, smells of burning or makes a severe grinding sound.
Check only ordinary accessible items when off
After the hood and cooktop are off and cool, check whether something stored against the housing could vibrate. If the model permits user-removable filters, confirm they have been refitted as instructed after cleaning. Do not hold a loose panel against a running fan to silence it.
Visible movement of the housing or a recently altered duct is useful to mention, but do not tighten concealed mounting hardware, enter a roof space or reach through a removed filter. Loose installation parts and internal fan problems require different work, and both can be unsafe to investigate without appropriate access.
The noise pattern and installation details are useful for our rangehood repair enquiry service.
Include extraction performance in the enquiry
A noisier hood with reduced airflow presents a different pattern from unchanged extraction with a light external rattle. Record which speeds worked before you stopped, whether lighting and controls still respond and whether filter care preceded the change. Do not assume that louder operation means stronger extraction.
Tell the repairer whether the hood is undermount, wall-mounted or a canopy and whether it ducts outside. Mention access above cabinetry and any recent kitchen work. Model, installation and symptom timing help distinguish motor, fan, mounting and duct-related possibilities without prematurely ordering a replacement motor.