Good morning my name is ***** ***** I will assist with your query.
Firstly do you know the model of extractor, secondly can you advise the age of extractor.
The most likely cause is the fan has seized or failed in some way and the noise your hearing is the motor, is the noise a high pitched noise, if not can you describe it?
This does sound like a motor failure or a transformer\power board failure.
Are the lights on the extractor working?
In order to check the motor you need to strip the extractor and then place a multi meter on the two terminals of the motor and check they are getting 240V.
If not power is going to the motor this points back to the control board, and probably an issue with the power regulator.
With regard to calling out an engineer if your not confident with a multi meter its best to call out an engineer, if you provide your postcode I can recommend someone in your area.
Yes, in most case the engineer will be able to identify the fault and then give you a quote for either replacing the component or fixing it such as reattaching a lose wire etc.
Please give me a few minutes while I look up the engineers in your area.
Sorry for the delay, I would recommend Robinson Repairs on 07958 463632. The engineer is a local guy, and has very good track record for getting units working again, and is very reasonably priced, he thinks it would cost around £50 to come out and repair the unit including parts.
Apologies there was a breakdown in communication, the £50 call out covers fixing any parts eg freeing a motor, re-attaching wires, but not replacing a PCB or motor. Without the part number its hard to give you a cost for replacement parts, however the motor and PCB are both rather expensive parts (£100+), and the age may also make it difficult to source parts.
I have also called a few other repair firms and they are quoting £82 just in labour, based on the age of the unit and cost of labour it may be worth considering replacing the extractor.
However if you wish to have it repaired I would still recommend RR.