What is the reason why there is no warm air in the car?

The reasons why the automobile air conditioner does not heat are the blockage of the warm air tank, the blockage of the air conditioner filter element and the aging of the air conditioner motor. Blockage of heating water tank: The low temperature of hot water inlet pipe and outlet pipe of heating water tank is a sign of poor circulation of air conditioning water tank. The radiator of the air-conditioning water tank is very thin. After long-term use, the scale and impurities in the coolant will block the pipeline of the radiator of the air-conditioning water tank, resulting in poor circulation of the water tank and unable to provide enough heat to transport warm air to the cab. This situation belongs to the internal blockage of the air conditioning water tank. Solution: Check whether the heating box is blocked. If yes, replace the heater water tank. Air conditioning filter plug: the main function of air conditioning filter plug is to filter out impurities in the air entering the air conditioning system. If the air-conditioning filter is blocked and the air entering the air-conditioning system is insufficient, the air-conditioning fan cannot generate enough air volume to provide warm air for the vehicle. Solution: Just clean or replace it. Aging of air-conditioning motor: when the air-conditioning motor is aging and the working efficiency is reduced, there will be a situation of loud noise but small air volume, and the heat of the warm air box cannot be transferred to the cab in time and effectively, resulting in the situation that the air-conditioning warm air is not hot. In addition, the blockage of air conditioning pipes is also one of the reasons for the small air volume of warm air. Solution: Go to the 4S store to replace new parts.