There are many reasons why the car heater is not very hot. The most common ones are the following:
1. After the cold engine is started, the car engine temperature is low. At this time, the heater is turned on. It won't get hot. This is normal and can be solved after the engine warms up;
2. Check whether the vehicle refrigerant is enough. If it is not enough, the heater cannot get enough heat and will naturally not get hot. When this happens, we can only solve the problem by adding antifreeze;
3. The thermostat is opened too early, causing the coolant to be in a large circulation state and the coolant temperature to remain low. Status;
4. There is 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 not be hot.
When the water temperature comes up, warm air and cool air
We need to check whether the vehicle has a refrigeration button. Generally speaking, the vehicle refrigeration button will be indicated by the "A/C" button. When the cooling button is pressed, the air conditioner compressor will turn on. At this time, the cold and warm air will blow together, causing the temperature of the warm air to drop. If the problem still occurs after turning it off, then you need to check the water tank temperature sensor. If the sensor fails and the cooling fan is turned on all the time, the warm air will become cooler.
There is a problem of abnormal noise when the heater is turned on in the car in cold weather
The sizzling sound when the heater is turned on is probably due to the lack of lubrication of the motor rotor, which wears out the distance between the stator and the stator. This resulted in a gap. When the blower is turned on, the speed is very high, and a sizzling sound will naturally occur. In this case, we can only replace the worn bearings in the blower. If the blower is seriously damaged, it is recommended to replace it directly. Car blowers rarely have problems in daily use. If you check them during maintenance, there will usually be no problems.