Dryer has started to make a loud sqealing when it starts and gets up to speed, the kind of sound a loose fan belt makes on a car, and now just makes a buzzing sound when the button is pushed but dosen't start at all. model # wx21001

check loose fan belt
check loose or worn gear

it could be a belt that is loose a little or is worn out and requires replacement. it could also be a weak auto tensioner for the belt.

I would say that your fan belt is loose,the one which
goes round the alternator and water pump pulley behind
the front fan. You can loosen two maybe three nuts on the
alternator,lever it until tight.I use a short pole so not over tight,
as you do this the nuts need to be tightened.It would be better
if you had help first time.
For safety sake check belt for splits and cracks or if really
thin and shiny.If so change it.
LUCK

check drum,look like around , if look goo change roller

Th cam shaft pulley has to be turning if motor running. Maybe fan is equipped with clutch that is bad.

If it is a rattling sound the starter may be loose, the starter bendix gear might be damaged.

If it sounds like a fan, it is likely the cooling fan.

If it is squealing, it is the serpentine belt. The idlers may be worn, their bearings may be dry- they make a chirping sound at slower speeds when they are dried out. Replacement is the best option.

Air pumps can sometimes make a thumping sound, and if certain emissions valving rusts through, it can be outright exhaust noise.

If it is a high pitch whine, that is usually the alternator. It is not a good sign when they begin to whine. Alternator bearings can also fail, and the sound varies.

Water pumps and fan clutches can also fail and they tend to make softer sounds. These can be checked by checking for radial play in each item with and without serpentine belt tension applied.

Is this noise like a loud buzz or hum? If it is it may be the motor draging
and can't quite get going. bearing getting worn.
Also check drum rollers or glides and the idler pully one of them may
be dragging if they are you might put a little high temp oil on it.
Hope this helps..

above your water pump there is a small hose that runs into it there check it make sure it is not leaking that will make it squeal and its cheap doesnt take much water for the belt to slip so?

I think you should start by putting a new belt on. This may solve the problem.

We had the exact same noise all of a sudden start coming from our 2 year old dryer. We checked everything, rollers, pulleys, motors, etc. I was certain it was coming from the upper left. Finally we found a loose screw had fallen into the front felt ring. Problem solved!
Good luck.