Sears can fix almost any broken garage door opener, regardless of the brand or where you bought it. Trying to repair a garage door opener yourself can be dangerous because of the spring tension. The Sears technicians who repair garage door openers are experts; they have the knowledge and experience to repair the garage door opener correctly and safety.
I give Chamberlain credit for trying to make the install easy. Considering the different operating environments and variables, it’s a challenge to cover all the bases. Unfortunately, a quick start guide simply isn’t enough in this case and the online instructions are no better. They have made some assumptions about what you need to know (or don't need to know). The above precautions should be spelled out to avoid customer frustration and reduce the number of calls to their help desk (and returned product).
Question- I bought a Clopoy coachmen series 8' garage door last April , over the winter the bottom panel got a dent in it [snow blower-rock?] It is about the size of an egg . Called to see if any repair can be done instead of replacing[similar to dent wizard for autos and was advised cant be done and had to replace 3 panels? not going to do that- is there any other opinions on this?