1, air conditioning panel is not adjusted properly.
Improper adjustment of the air conditioning panel means that the heating and cooling knob is not adjusted to the maximum end of the red area, or the temperature is not adjusted to the maximum temperature by pressing the key. Just adjust the knob to the maximum end of the red area or press the button to adjust the temperature to the maximum temperature, so that the heater can work normally.
2. Lack of antifreeze
Insufficient antifreeze, due to insufficient coolant in the engine cooling system and insufficient water circulation in the warm air tank, the common models are Hyundai and Great Wall. Warm air needs to be supplemented with antifreeze before it can be used normally.
3. The heater control mechanism is damaged
The heating control mechanism is damaged, the clothes feeding motor is damaged, and the water valve is designed on the heating water pipe, which will not open after being closed. The solution is to need maintenance.
4. The water pump in the engine water circulation system is damaged.
The water pump in the engine water circulation system is damaged, and the thermostat is not installed due to maintenance or some reasons, or the thermostat is damaged and needs to be repaired and replaced.
5. The heater water tank is blocked
High pressure gas and high pressure water pump can be used to dredge the warm air water tank repeatedly. If the effect is not good after dredging, it is recommended to replace the warm air tank with a new one.