When the appliance is operating, the pump and compressor will generate noise. This is normal and does not indicate that the appliance is malfunctioning. However, if the noise does sound concerning, the list below could indicate why your tumble dryer may be behaving in such way.
If the appliance produces loud noises, this could be due to wear of the drive belt, which wraps around the drum and the drive motor. In this case, we recommend booking an engineer visit to have the appliance inspected and the fault professionally addressed.