The door latches on some of the f150s, including mine, freeze under certain weather conditions. This presents the latches from opening. This can trap an individual inside in an emergency situation, or prevent someone from opening the door external to remove or address babies and children, which is an issue I experienced. Ford is aware of the problem, but will not repair unless the issue is replicated in an unrealistic environment. This leaves many owners at risk of a dangerous situation should the issue occur in a non-controlled environment. The inverse issue can also occur, where the door latches does not close properly and can cause the door to open during driving, and this has also been experienced. There are no warnings of the problem ahead of time.