If the heater in the car is not hot, it may be because the heater pipe is blocked. In this case, it is necessary to clean the water tank with detergent to decompose the scale into powder, so that the water pipe will not be blocked.
It may also be because the blower is broken, because the blower can suck cold air into the heat exchanger to absorb heat, and then blow hot air into the car; If the blower fails, it needs to be replaced with a new one.
It is also possible that the refrigerant circulation valve and flow valve are damaged, so that the normal temperature and flow rate of refrigerant cannot be maintained, and there is no warm air in the air conditioner; At this time, you need to go to the 4S shop to check the cause of the failure and repair or replace it.