My daughter recently found that her garage door was frozen stuck to the garage floor. So, in the bitter cold, dressed for work and in a hurry, she found herself chipping ice away from the bottom of the garage door so that she could get it open. Others, faced with the same problem, resort to heat guns, hair dryers and de-icing products to free the door.
One thing that is almost certainly bound to make things much worse quickly is to keep trying to open the stuck door with the garage door opener. This can lead to stripped gears, broken coils and motor failure, among other costly-to-repair damage. As irritating as it can be, the best solution is to slowly try to melt or chip away the ice until the door opens and closes normally.