The temperature of warm air cannot rise.

The source of automobile heat is the heat of engine. Sending warm air to the car through the coolant circulation device, you said that there are several considerations for the car not to heat:

1. Is the engine water temperature normal? Is there enough heat?

2. Is the heating pipe blocked or leaking?

3. Are the heating switch and heating cycle mode normal?

4. Is the external circulation device turned on when the warm air is turned on?

The problem is not complicated, but you can check whether several switches are suitable first. If there is nothing wrong with the switch, it is recommended to check it in the store. I hope I can help you. 65438+ At this time, it is necessary to consider whether the filter is dirty and blocked, whether the operation speed of each gear of the blower reaches enough speed, and whether the heating box is out of order.

2. The thermostat has been on all the time or opened too early, which makes the cooling system have a big cycle prematurely, and the outside temperature is very low, especially when the car is driving, the cold air quickly cools the antifreeze, the engine water temperature does not come up, and the warm air does not heat up.

3. The water pump impeller is damaged or lost, so that the flow through the warm air small water tank is insufficient and the heat cannot come up.

4. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and not hot warm air. If there is gas in the cooling system all the time, it is likely that the cylinder pad is damaged and the gas leaks into the cooling system; If the inlet pipe of the small heating tank is very hot and the outlet pipe is very cold, this situation should be that the small heating tank is blocked and should be replaced. It may be caused by abnormal operation of engine cooling system and heating control mechanism. The method of discrimination is simple. Look at the temperature of the two inlet pipes of the warm air small water tank. If both pipes are hot enough, there is something wrong with the air flow control mechanism. On the contrary, if both pipes are cold, or one is hot and the other is cold, it is a problem with the cooling system.