The door is getting colder and heavier. What happened?

Because the weather gets cold in winter and the temperature is low, especially when there is a fire in the morning, the viscosity of engine oil and hydraulic oil is high and the fluidity is poor, so it will feel particularly heavy. This is a normal phenomenon. Don't worry too much. You can get back to normal in ten minutes by car. Just pay attention to maintaining the vehicle in time.

Another reason for getting heavier is low fetal pressure. Tire pressure varies with temperature. If the tire pressure is low and the weather gets cold, the tire pressure will be lower, so it will become heavier.

In addition, due to freezing rain or snowfall, rain or snow water will penetrate into the gap of the car. Under the action of low temperature, some parts of the car will be "frozen", such as the door, and the door will not be opened.