You can leave a dryer unplugged for as long as you need without any negative consequences. Unlike some appliances that may require periodic use or maintenance to keep them in good condition, dryers do not have specific requirements for how long they can remain unplugged. However, if you plan to leave your dryer unplugged for an extended period, it's always a good idea to clean out any lint from the lint trap and ensure that the dryer is free of any debris before storing it or leaving it unused. Additionally, when you decide to use the dryer again after a long period of inactivity, it's recommended to check the manufacturer's instructions or consult a professional to ensure everything is functioning properly before use.