Zanussi ZDC37200W tumble dryer Drum not turning rotating

I will try and help with this problem Zanussi ZDC37200W tumble dryer

Good afternoon Will from your description I think the jockey wheel which is attached to the motor has broken and snapped the belt.  you will need to take the lid off and inspect the belt has snapped I have put the link below to all the parts you need and a couple of videos to assist you in changing the belt and the pulley wheel at the bottom of the page you will find a full list of parts for Your model of the tumble dryer. Please be aware this machine had several different production runs as you will see with all the numbers that I have put here make sure that the parts that you are ordering fit the production number on your machine 

Drum rotation

1 – Motor

2 – Belt tensioner spring

3 – Belt tensioner

4 – Belt

The drum is rotated by a belt (4), which is driven by the pulley of the drum motor (1) fitted to the base; on the

bearing shield there is a belt tensioner (3), which has the function of increasing the winding angle of the belt to the drum and works in conjunction with the belt tensioner spring (2).

Bidirectional operation of the drum rotation is determined by the electronic board which inverts the motor power direction for brief periods. Reversal of the direction of rotation allows the clothes to unroll.

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Zanussi ZDC37200W tumble dryer spare parts

Genuine ZANUSSI Tumble Dryer Drive BELT 1975H7 1258288107

1250125208 pulley wheel

Zanussi ZDC37200W tumble dryer full list of spare parts for this model below