Yeah behind the glove box noise is probably motor for the fans which is stupidly made with a combination of plactic and metal so can easily break.
The noise when that goes away when you press the clutch isn't always the DMF as my clutch and flywheel were replaced at 57k now on 81k i've had the same sort of noise for the last 10k and I got told that it is most probably the release bearing IIRC, so best to get it properly checked out before you pay hundreds to get your DMF changed.
Always get it checked ut by a qualified mechanic before you start shelling out your hard earnt money. Here you'll get pointers as to what it may be.