If your dryer is not tumbling but still makes noise and heats up, there could be several potential issues causing this problem. Here are some common culprits to consider:
Broken or worn-out belt: Most dryers use a belt to rotate the drum. If the belt is broken, worn, or slipped off the pulley, the drum won't turn even though you might still hear the motor running.
Faulty motor: The motor is responsible for turning the drum with the help of the belt. If the motor is faulty or burned out, it won't be able to rotate the drum, but it may still make noise when it runs.
Broken drum rollers or glides: Dryers have small rollers or glides that support the drum's rotation. If any of these components are broken, damaged, or worn out, the drum won't turn properly.
Defective idler pulley: The idler pulley maintains tension on the belt, helping it rotate the drum. If the idler pulley is damaged or worn, it may not apply enough tension to the belt, resulting in a lack of drum movement.
Jammed or obstructed drum: Check if there is any item stuck between the drum and the dryer's walls, preventing the drum from spinning freely.
Broken drum motor or drive motor: If the motor responsible for turning the drum is malfunctioning, it won't be able to rotate the drum despite producing noise.
Electronic control board issue: Modern dryers have electronic control boards that manage various functions. If the control board is faulty, it may not send the right signals to engage the motor or the drum.
Drive belt tensioner problem: Some dryers have a tensioner pulley that maintains the correct tension on the belt. If the tensioner is damaged, the belt may not have the proper tension to turn the drum.
To diagnose the exact cause and perform the necessary repairs, it's best to consult the dryer's user manual, hire a professional appliance repair technician, or contact the manufacturer's customer support. Remember to always unplug the dryer before attempting any repairs or inspections to ensure your safety.