Last year our garage door opener acted up when the weather got colder. It would go half way up and then stop and then act erratic and eventually we had to pull it down or up as we pressed the remote. We left for Florida for the winter expecting to call Sears for repair however when we returned in the Spring the door worked fine and has all summer and fall. Now that the weather is getting colder it has started acting erratic again. What is the solution?