What is the reason for the normal water temperature of the car, the warm air is not hot, and the coo

The vehicle heating system is not hot can be divided into two reasons, one is caused by the engine cooling system, and the other is caused by the poor work of the heating control mechanism.

Problems that can arise with the cooling system:

1. Thermostat.

Normally open or the thermostat is turned on too early, so that the cooling system is prematurely circulating, and the outside air temperature is very low, especially when the car is running, the cold air quickly brings the antifreeze.

Cooling, the engine water temperature will not rise, and the heater will not be hot.

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

3. There is air resistance in the engine cooling system, which leads to poor circulation of the cooling system, resulting in high water temperature and unheated heat. If there is always gas in the cooling system, it is likely that the cylinder head gasket is damaged and the gas is flowing into the cooling system; If the inlet pipe of the warm air small water tank is very hot and the water outlet pipe is cold, this situation should be that the warm air small water tank is blocked, and the warm air small water tank should be replaced.

Problems with the air volume control mechanism:

1. The warm air of the car is to use the blower to blow the heat of the small water tank of the warm air into the cab, if the air volume is not enough or the hot and cold air.

If the distribution is not good, the heat of the small water tank of the warm air cannot be dissipated, and the temperature of the warm air will not come up. At this time, it is necessary to check whether the filter is dirty and blocked, clean it, and replace it in time if necessary.

2. Check the gears of the blower.

In the case of operation, each gear must reach sufficient speed. If the knob is adjusted to the position of the warm air, the air volume is large enough, the wind direction is normal, and the cool breeze blows out, you should check whether the control flap cable of the hot and cold air box falls off, whether the warm air impeller is damaged, whether the flap falls off, etc., and the warm air will heat up after troubleshooting.

The water temperature is hot, and it won't be hot for a while, and it's the second and third gear in the 11th gear, and the cool breeze will come up immediately.

The way a car turns on the heating system in the winter is different from the way it turns on the cooling in the summer.

If you turn on the heater system in the same way that you turn on the refrigeration, the wind blowing out will be very cold. Since the cold air regulator relies on engine cooling in summer, the cold air will be discharged directly after ignition on the car and when the air regulator is turned on.

The possible cause is a clogged warm air tank, either due to the use of inferior antifreeze, or a long-term addition of water, which causes rust to clog the warm air tank.

Solution, disassemble the dashboard, blower out the warm air water tank, if the warm air water tank can be opened, then open the cover with a strip to dredge, dredge can not be too hard, to avoid crowding the heat pipe of the water tank, if you can not open the cover, buy a bottle of rust remover added to the warm air tank, put it for about an hour (depending on the situation) in the tap water flush, you can dredge the blockage.

The first thing to see is whether the air conditioner is on? If the bucket is set correctly, what do you mean by okay water temperature? Blowing warm air in place, driving up to blow cold wind? This situation is generally like this for vans, because the seal is not good. A cover on the front of the car is required.

First, if it is because of the quality of the coolantIf the pipeline is blocked, the coolant in the cooling system will not be able to circulate or the circulation will deteriorate, and the phenomenon will not be that the water temperature cannot go up, but that the water temperature will rise sharply.

Second, most of the cars on the market, the energy of warm air**,It is supplied by the engine's coolant, and once the coolant is reduced or not circulating, the warm air in the car** will weaken or become cooler. The maintenance master also turned on the heater system, and no abnormalities were found during the test run!

Thermostat function.

Controls the size of the coolant circulation. The coolant circulation channel is divided into two channels, one is only circulated inside the engine, which is called a small circulation. The other is from the engine to go through the water tank cooling and then enter the engine, which is called the large cycle.

Thermostats are installed at the forks in the large and small cycles. When the thermostat is turned off, the cooling water can not come out, and can only be circulated for a small time, and when the thermostat is turned on, the cooling water can come out for a large circulation. The thermostat generally starts to open slowly when the water temperature is 80 degrees Celsius and opens completely at 103 degrees Celsius.

Under normal circumstances, there is no reason why you can't get up, so you can try it first. If you open the front cover and touch the upper and lower water pipes are very hot, and the water temperature of the water temperature gauge is not high, it may be that there is a problem with the water temperature induction, if the upper water pipe is hot, the lower water pipe is not hot, the thermostat may be broken and needs to be replaced. The warm air is dissipated to the cab through the hot air blown out of the engine water tank through the water in the engine water tank, and the water temperature is not high, so there is no warm air.

The engine temperature does not rise or the heating speed is very slow, and the warm air is not hot, most of them will be manifested as traffic jams or waiting for the red light when the water temperature rises, and the temperature drops rapidly as soon as the car runs. The main reason for this is the failure of the thermostat, which is always kept in a state of large circulation and is improved immediately after the thermostat is replaced.

The water temperature is normal, and the warm air is not hot. It may be that the pump or cooling circuit is experiencing air resistance.

There is a problem with the engine cooling system. Coolant.

It cannot be circulated, and the coolant cannot be sent into the warm air tank after heating, so that the warm air is not hot.

It is also possible that the vehicle's pump impeller is damaged or missing, resulting in a decrease in the amount of water flowing through the tank, resulting in a warm air that is not hot and needs to be replaced with a new pump impeller. It is also possible that the air conditioner filter is clogged, and there is a problem with the heating control mechanism, resulting in insufficient air volume blown into the car by the blower or hot and cold air.

Improper distribution of other warm air is not hot.

The specific reasons why the water temperature is normal and the warm air is not hot are as follows:

1. The air conditioner filter is dirty and blocked, which will cause less air to blow out, which will affect the heating effect of the warm air.

2. Thermostat.

Normally open or the thermostat is turned on too early, causing the cooling system to go through a large cycle prematurely. If the outside temperature is very low, the cold air will quickly cool the antifreeze.

The water temperature of the engine will not come up, and the heater will not be hot.

3. The impeller of the water pump is damaged or lost, so that the flow through the small water tank of the warm air is insufficient and the heat does not come. The engine cooling system has air resistance, which leads to poor circulation of the cooling system, resulting in high water temperature and warm air failure.

4. The car heater uses a blower to blow the heat of the small heater tank into the cab. If the heater tank is blocked, the heat of the small heater tank cannot be dissipated, and the temperature of the heater cannot come out.

5. If the knob is adjusted to the warm air, the air volume is large enough, and the wind is normal, blowing out the cool air may be the hot and cold air wire of the warm air box is out of control, the warm air impeller is damaged, whether the damper is lost, etc., if the warm air water valve is damaged, the coolant may not be able to enter the warm air, resulting in the warm air water tank is not hot.

In some high-end cars, there will be a heating water valve, its function is to cut off the coolant circulation of the heating water tank when the heating is not in use, reduce unnecessary heat loss, if the heating water valve is damaged, it may cause the coolant to be unable to enter the heating water tank, resulting in the heating air is not hot.

After the owner knows the heating and air conditioning problem of the car, because the parts of the car air conditioner are inside, it is difficult to repair, so it is best to go to a 4S shop or repair shop to let professional maintenance personnel solve the problem.

It could be a problem with the filter, it could be a problem with the thermostat, it could be a problem with the impeller of the water pump, it could be a problem with the blower, or it could be a problem with the engine.

It is because there is a problem with the heating system, and the air outlet may be blocked by other objects, so you should go to the 4S store immediately for inspection and maintenance, and you can have a warm air.

It could be that there is a problem with the engine, or it may be that the temperature outside is particularly cold, so there is no heat.

1. The principle of simple first and then complex, considering whether the air conditioning filter element has not been replaced for a long time, this is the simplest and most easily ignored thing, because if the air conditioning filter element is dirty and blocked, the air blown out will be much smaller, which will affect the heating effect of the warm air.

2. Insufficient antifreeze will also affect air heating. This is not only an indispensable medium for cooling the engine, but also a heat conductive medium for heating the car. When the antifreeze that absorbs the heat of the engine enters the warm water tank, it heats the warm water tank, and the air that blows through the warm water tank is hot air.

There are two reasons for the normal water temperature of the car and the hot air.

1. The inlet and outlet of the warm air are blocked, there is no air circulation, and the heat of the water tank cannot be dissipated through the warm air.

2. The heater motor is damaged, or the motor power supply line is in poor contact or open, or it is possible that the fuse of the heater motor is burned, which are the reasons why the heater is not hot.

Solution, clean the inlet and outlet filters of the warm air, check the warm air power supply system, you can find the reason why the warm air is not hot, solve the problem of finding the problem, you can solve the problem of the warm air is not hot.

Hello, it is advisable to check the warm air and water valve of the vehicle. The difficulty of the chiller valve is that it is used to control the warm air of the vehicle.