my tumble dryer doesnt work? its an indesit idc75 condensor dryer?

theheater works , it runs for about 40mins then cuts the electric.
the little box that hold the pump is just filling with water and the box thats supposed to collect the water is empty . everything has been thoroughly cleaned .
so im presuming that the pump isnt working but am not an expert or even know anything about tumble dryers but i would rather have an opinion before buying the part. thank you for any help its appreciated