Garage door sticks when I close it in cold weather
I've been having a nagging problem with my automatic garage door and I wonder if anyone has any suggestions (before I call in a repair person). The door opens fine. But when I close it, when the temperature is cold, the door will close about a foot, and then reverse itself and open, as if it hit an obstruction.
The only way I can close the door is to stop it as soon as it starts to reverse, and then immediately close it again. Sometimes I have to do this stop-start thing several times to get it fully closed.
Any ideas are appreciated. It's a fairly old unit, so I wouldn't be surprised if it just needs to be replaced. But I'm hoping there might be some things I can try to do to fix it.