What should I do if the car heater is not warm?
In most cases, the inside of the small water tank is clogged, which is related to the fact that the coolant is not up to standard or has not been replaced for a long time. You can try flushing it without disassembling it, because replacing this small water tank requires disassembling the central control, which is time-consuming and labor-intensive. If it cannot be flushed, you can consider changing to a smaller water tank. Car warm air is actually the high temperature caused by the coolant temperature rising to a high enough level. This liquid flows through the warm air radiator and heats the radiator. The so-called warm air radiator or water tank is actually the same as the water tank at the front of the engine, but is scaled down. .
The water pump provides circulating power for the heating system, delivers high-temperature coolant to the heat exchanger, heats the air blown in by the blower in the air duct, and then sends the hot air into the cab to achieve heating. Check whether the cooling water is sufficient, check whether the thermostat is working, and check by changing the engine speed and measuring the temperature difference between the upper and lower water pipes. Check the water pump to visually observe the water circulation status. Check whether the radiator fan is working for a long time, etc.
If it is not hot when the heater is turned on after the water temperature comes up, check whether the A/C indicator light on the air conditioner panel goes out when the heater is turned on, and whether the damper adjustment knob is turned to the hottest area. If the damper is adjusted Wrong, even if you turn on the heater, it won't get hot. , see if the temperature of the two water pipes is the same. If the two water pipes are not hot or there is a temperature difference, it means that the coolant does not transfer heat to the heater water tank. You need to check whether the heater water tank or water pipe is blocked. . In this case, we can directly remove the air conditioning filter and feel whether the warm or cold air from the air conditioner has improved, and then directly replace the entire air conditioning filter element.
The car heater is not warm, or the car hot air comes up slowly. There are several possibilities. The first possibility is that the filter is clogged, resulting in low wind and no heat. The second possibility is that the thermostat is faulty. It causes the air conditioning system to cycle for a long time, and it may also be caused by the water tank being clogged. Now that we know the principle of heating, we need to check which components are faulty and cause the air conditioning and heating system to not work.