There can be several reasons why some clothes dryers are loud when they're running:
Poor installation: Improper installation can lead to vibrations and rattling noises. If the dryer isn't leveled correctly or if it's not properly secured, it can create excessive movement and noise during operation.
Loose components: Over time, certain components within the dryer can become loose. Loose drum baffles, loose screws, or worn-out belts can cause rattling or banging noises while the dryer is running.
Worn or damaged parts: Wear and tear can lead to noisy operation. Components like drum support rollers, idler pulleys, or motor bearings can wear down over time, resulting in squeaking, grinding, or screeching noises.
Foreign objects: Sometimes, small objects like coins, buttons, or debris can get caught in the dryer drum or vent system. As the dryer operates, these objects can create rattling or clanking sounds.
Ventilation issues: A clogged or restricted dryer vent can cause the dryer to work harder, resulting in increased noise. It can also lead to overheating and reduced efficiency.
Age and maintenance: Older dryers may naturally become louder over time due to wear and tear. Lack of regular maintenance, such as cleaning lint filters or lubricating moving parts, can also contribute to increased noise levels.
If your dryer is excessively loud, it's advisable to troubleshoot and identify the source of the noise. You can consult the dryer's user manual for troubleshooting tips or contact a professional appliance repair technician to inspect and repair any faulty components. Regular maintenance, including cleaning and lubrication, can help prevent excessive noise and prolong the lifespan of your dryer.