Sai opened the warm air and didn't respond. What happened?

First, determine whether it is windy or hot.

If there is no wind, it is usually that the blower and electric stove are out of order.

If it is not hot, it means that the vehicle is not preheated and the water temperature is not high enough. It may be caused by the damage and blockage of the heater tank after the hot car is heated.

I suggest you go to the repair shop to have a check. I hope I can help you. If you have any questions, please ask.