How to turn on the heater in Toyota's 2014 Corolla? Why is the heater not hot in 2014 Corolla? The reasons why the heater is not hot in Toyota's 2014 Corolla: One is caused by the engine cooling syste

How to turn on the heater in Toyota's 2014 Corolla? Why is the heater not hot in 2014 Corolla? The reasons why the heater is not hot in Toyota's 2014 Corolla: One is caused by the engine cooling system, and the other is caused by the heater. Caused by poor performance of the control mechanism. The method of identification is very simple: look at the temperature of the two water inlet pipes of the small heater water tank. If both pipes are hot enough, it means there is a problem with the air volume control mechanism. On the contrary, if both pipes are cold, or one pipe is hot and the other is hot. If it is cold, it means there is a problem with the cooling system. Possible problems in the cooling system: The thermostat is always open or the thermostat is opened too early, causing the cooling system to undergo a large cycle prematurely. When the outside temperature is very low, especially when the car is running, the cold wind quickly cools the antifreeze. , the engine water temperature cannot come up, and the heater air will not heat up. The impeller of the water pump is damaged or lost, causing insufficient flow through the small warm air water tank and preventing heat from coming up. There is an air blockage in the engine cooling system. The air blockage causes 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 cylinder 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 cold, this situation should be that the small heater water tank is blocked. , the small heater water tank should be replaced. Problems with the air volume control mechanism: The car's warm air uses a blower to blow the heat from the small warm air water tank into the cab. If the air volume is not enough or the hot and cold air distribution is not good, the heat from the small warm air water tank cannot be dissipated and the problem will occur. This will cause the temperature of the warm air to fail to rise. At this time, first check whether the filter is dirty and blocked, clean it, and replace it in time if necessary. Check the operation of each gear of the blower. Each gear must reach sufficient speed. If the knob is adjusted to the warm air position, the air volume is large enough, the wind direction is normal, and cool air blows out, you should check whether the cables of the hot and cold air control flaps of the heater box have fallen off, whether the warm air impeller is damaged, whether the flaps have fallen off, etc. After troubleshooting, the heater will heat up.