More than likely you have a Sears, Lift-Master, or Chamberlin opener. Chamberlin is the parent company for both Sears and Lift-Master, their gear assembly inside usually lasts between 7 and 10 years. The motor will run and make a humming noise, but nothing will happen. The gear and sprocket assembly are made of nylon plastic and simply wear out, it is one of the top five service calls we get. If you are very handy, you can try to replace it yourself. Otherwise, give us a call and we can be there the same day to fix it. Service is everything in this industry, and we have many 5 star reviews to prove it!
