Pacific Automotive Network is preparing for winter. After a summer of deactivation of car heaters, many people find that there is no heater in their cars. The reasons are: 1. The heater water tank is blocked. 2. Thermostat failure. 3. The heating water valve is faulty. Specifically, you can go to the repair shop for inspection and repair.
1. The heater water tank is clogged. The car's heater water tank can actually be regarded as a reduced version of the engine water tank radiator. Its internal structure contains many small heat dissipation pipes. Such a structure is the same as the water tank radiator, which is prone to internal damage. clogging situation. After it is clogged, the flow rate of the coolant inside the heater water tank will slow down, the flow rate will become smaller, the heat supply will be insufficient, and the air conditioner heater will naturally not be hot.
2. Thermostat failure. In fact, a common failure of the thermostat is that it cannot be turned on. However, if the heater is not hot due to a thermostat failure, it is because the thermostat cannot be closed, which is "the thermostat is always open." After the thermostat is normally open, the coolant circulates widely from the engine idling. If the car is used in the northern winter, the water temperature will be low for a long time and will not rise. The air conditioner warm air will naturally not be hot. This can also be seen from the water temperature meter. The meter needle is obviously lower than the normal scale, so if the heater is not hot and the water temperature gauge needle is still low, you may need to check the thermostat.
3. The heating water valve is faulty. After the heating water valve fails, the opening of the electronically controlled valve is no longer controlled by the computer and is in a normally open, normally closed or fixed position. At this time, no coolant flows through the warm air water tank or the flow is uncontrolled, and the air conditioner heater Wind temperature is naturally uncontrolled.