Having in front of you a rough plan of what follows, it will be easier for you to understand the technique and not make mistakes. However, keep in mind that it is better not to try to fix some breakdowns with your own hands, even if they are very itchy. Sometimes it is better and cheaper to contact a service workshop.
Most often, we encounter dryer breakdowns already in the process of dryings. In this case, any repair work will have to start with a standard procedure.