After three hours it opened. It was frozen after all . The reason I thought it wasn't frozen Is that I drove for about half an hour with the heating at high. I left it in the sun for about an hour after that and when I went out it opened. I took it to the car wash two days ago and the water must have got into the mechanism , so be warned about that. The door was jammed solid,my wife had to sit in the back,she thought I was her driver.