Craftsman opener model 139.53413
I have an older Sears Craftsman 1/2 HP garage door opener that recently stopped working. When I press the button to open the door, I hear the motor running, but the chain mechanism doesn't move. The motor runs for a while, then it stops for a second and starts running again. My guess is that the opener is so old that it will need to be replaced, but I thought that it might be worth asking whether there's some simple solution to the problem. Thank you.