Garage door openers sometimes fail due to many reasons. One of the main reasons is the misalignment of the garage door or track. Most companies that provide garage door openers also offer repair and maintenance services to customers. They have trained and experienced technicians who can identify the exact problem with the system and replace the part with certified spare parts. Getting a door opener repaired is often less expensive than getting an entirely new garage door opener. And after the repair, the opener is as good as new. One way of checking whether the door opener needs repair or maintenance is to open the door halfway by hand and then letting it go. The door should stay in the same position if it is in a good condition.

It is estimated that a garage door opener's springs have to be replaced once in every 5-7 years. Frequent servicing of garage door openers prevent problems and may also increase the life span of the opener. Even though some repairs may be done by the customer himself using a manual, it is better to take the help and advice of a qualified technician to repair the opener. A qualified technician would not only fix the present problem but also ensure that the opener is properly serviced to avoid other problems. Besides, garage door openers have many safety features that have to be adhered to and these may be too complicated for a layman's understanding.

There are some websites on the internet which provide advice on repairing garage doors and garage door openers. They provide information about the general maintenance and for some troubleshooting. There are also many books available in the market, which give information for self-repairing garage door openers.