The process of Craftsman garage door opener repair begins with pinpointing the precise cause of the problem. If the unit cannot be started with the use of the remote control, but can be operated via the wall button, then the issue lies with the clicker and it has to be fixed. If the opener makes strange sounds and does not open or close the door, the problem lies with one of the internal components. This could be the motor, capacitor, circuit board or moving gear. In some cases, the malfunctioning part can be fixed, but most often it has to be replaced with a new one that is a complete match.
If the chain drive is rusty, it will make scraping sounds during movement. Rust is removed with the use of a safe solvent. If the chain or belt drive is broken, the damage will be clearly visible and the opener will not function at all. The chain or belt will have to be replaced.