A garage door threshold warmer is provided. The garage door threshold warmer includes an electric heating element positioned within a seal that is securable at the lower end of a garage door. The heating element is designed to prevent the seal from freezing to the garage floor in cold climates, thus minimizing damage to the garage door and maintaining an effective seal against snow entry. The heating element is in electronic communication with a power source via a wire system that includes mating first and second connectors for ease of disconnection and reconnection as the garage door moves between an open and closed position, respectively. This automatic disconnection and reconnection mechanism engages as the garage door opens and closes to ensure that the heating element is only activated when the door is closed.