An annual service visit is the difference between replacing a $12 roller and replacing a bent panel. Most emergency calls we take were preventable.
Maintenance covers lubricating moving parts, tightening hardware that vibrates loose over thousands of cycles, balancing the door against the spring, adjusting travel and force limits on the opener, and testing the photo-eye and auto-reverse safety features. You get a written note of anything wearing out so nothing is a surprise later.