The reasons why the vehicle heating system is not hot can be divided into two aspects:
1. First, it is caused by the engine cooling system;
2. The heating system Caused by poor performance of the control mechanism.
Problems like this are all hardware problems and generally cannot be solved by yourself. You need to go to a repair shop for repairs. But you can judge by yourself which kind of problem it is. The identification method:
If the temperature of the metal pipe in the water tank is hot, it is the cause of the control mechanism failure. If the water tank is cold, it is the cooling system failure. reason.
Extended information:
Possible problems in the cooling system are:
First, the thermostat is always open or the thermostat is opened too early, causing the cooling system to If the large cycle is carried out prematurely, and the outside temperature is very low, especially when the car is running, the cold air will quickly cool the antifreeze, the engine water temperature will not rise, and the warm air will not heat up.
The second is that the water pump impeller is damaged or lost, causing insufficient flow through the small warm air water tank and preventing heat from coming up.
Third, there is air blockage in the engine cooling system. The air blockage leads to poor circulation in the cooling system, causing the water temperature to be high and the warm air to be tepid. If there is always air in the cooling system, it is likely that the head gasket is damaged and air is flowing into the cooling system. If the water inlet pipe of the small heater water tank is very hot and the water outlet pipe is relatively cold, it may be that the small heater water tank is blocked. The small heater water tank should be replaced.