Dryer drum does not turn, but you can hear the motor humming when a cycle is started.

Safety first: Unplug the dryer before removing any panels. The drum is heavy; support it properly during repair.

Step-by-step checks:

• Check drum movement: Open the door and try to rotate the drum by hand. If it spins very freely with little resistance, the belt may be broken.
• Inspect through rear panel: Remove the rear panel. Look for a loose or broken belt at the bottom of the cabinet.
• Replace belt: If broken, remove the old belt. Fit a new Proline-compatible belt around the drum, routing it around the motor pulley and idler pulley according to the belt path diagram (often in the service manual).
• Check idler pulley: Ensure the idler spins freely and is not seized or excessively worn.

When to call a technician: If you are not comfortable lifting and supporting the drum to fit the belt, professional installation is recommended.