Check the warm water pipe of the engine: feel the temperature of the two warm water arrows of the engine, and the heat indicates that there is no problem with the water temperature.
2. Check the hot and cold adjustment button on the air conditioner heater control panel: If the heater is set to the hottest position, there will be problems with the adjustment of the air conditioner heater, whether it is the hottest or not.
3. Check the quality of the thermostat: If the hot water pipe is not hot, it may be a problem of saving temperature, or it may be that it is opened too early and the water does not rise completely.
Common faults of vehicles without warm air are eliminated as follows:
There is no wind at the air outlet: first, look at whether the air conditioning filter element is blocked and there is no wind. Turn on the blower, turn the wind speed to the highest, and see if the blower works.
There is no wind when the air is out: it appears in the configuration of dual-temperature air conditioners, and there are wiring problems or servo motor problems.
The air outlet is cold air: the car has not changed the antifreeze for a long time, and the antifreeze has lost its anti-rust cleaning function, resulting in more impurities in the water, and the water pipe or warm air tank prevents it from carrying out effective small circulation, which in turn leads to no warm air.