If your dryer is making a ticking sound even when it is unplugged and not in use, there could be a few potential causes for the issue. Here are some things you can check:
Ventilation system: Check the dryer's ventilation system, including the exhaust hose and vent. Sometimes, debris or small objects can get trapped in the vent, causing a ticking sound as air flows through or when the system vibrates. Ensure the vent is clear and clean.
Loose objects: Inspect the dryer drum and the interior for any loose objects. Items such as coins, buttons, or other small items can get stuck in the drum fins or other parts, causing a ticking sound as the drum rotates. If you find any foreign objects, remove them carefully.
Drive belt or pulley: The ticking sound could be due to a worn-out or misaligned drive belt or pulley. Over time, these components can become loose or damaged, causing them to hit against other parts of the dryer. If you have the necessary skills, you can try inspecting and replacing the belt or pulley. However, it's generally recommended to consult a professional technician for this type of repair.
Timer or control panel: It's possible that the ticking sound is coming from a faulty timer or control panel. Electrical components can sometimes make ticking or clicking noises even when not in use. In this case, contacting a professional technician would be the best course of action to diagnose and repair the issue.
Remember, working with electrical appliances can be dangerous, so if you're unsure or uncomfortable with any of the steps mentioned above, it's always recommended to seek assistance from a qualified appliance repair professional. They have the expertise and knowledge to safely troubleshoot and fix the problem with your dryer.