If the door opens smoothly by hand the problem is with the opener.
Garage door stops opening cold.
Cold makes the space between molecules lessen which makes objects such as garage doors contract.
If you find that it keeps running this can present a problem in your system.
In cold temperature the space between molecules reduces making the metal shrinks.
Try to lift the garage door by hand.
Brush away snow and puddles often to prevent the weather stripping from becoming damaged.
Another reason that your garage door won t open all the way in cold weather is probably that the metal has contracted.
In a typical situation the motor for your garage door opener should stop running once the door has closed.
Then as you raise the door the strip peels and you lose the proper sealing that insulates the garage s interior.
One of the most common reasons a garage door won t open in cold weather is that the metal has contracted.