That sounds like the fan under the printer cooling the board - sounds like it is rubbing the cables or similar to me - I would get that looked at as soon as, you don't want a shredded power cable coming into contact with anything!

Not sure how the creator pro comes apart - but I expect there is access via the bottom if you flip it over and take a look.
Inside will be a board, power supply and a bunch of cables:

Look at this not sure if yours is the same:
https://www.youtube.com/watch?v=7DTXoZlb5_0

The little fan towards the bottom of the picture - check for wires coming into contact with it, the only other fan underneath on the Creator Dual is in the PSU. Could be that bundle of wires has come out of its cable tie