In hot summer, car air conditioning plays the biggest role. Southerners pay more attention to air conditioning and seldom use warm air, so many car owners may not know that the warm air valve is broken. Today, BMW's heater valve is broken.
Symptoms of BMW heater valve damage:
1. After the temperature rises, the wind coming out of the air outlet is still not hot.
2, can't turn off the warm air, the air outlet is still hot air after the temperature drops.
3. In the automatic mode of turning on the air conditioner, the temperature inside the car can't reach the constant temperature effect.
Working principle of warm air valve: Warm air water valve is the warm air switch of automobile heater. The working principle of the automobile heater is that the radiator in the heater is connected with the circulating water of the engine through the water inlet and outlet pipes, and the water valve is a switch: when the water valve is opened, the water channel is connected, the circulating water of the engine enters the radiator, and the fan blows heat into the cab; On the contrary, the water valve is closed and the warm air doesn't work.
Maintenance skills of warm air valve;
1. In the season when the weather is not cold, the warm air inlet valve can be closed to isolate the engine cooling system from the warm air valve.
2. In cold winter, before using warm air, check whether the left and right air supply pipes and air inlet and outlet pipes are loose, falling off and broken.
3. Check whether the warm air system vibrates abnormally, whether the pipeline leaks, whether the water level of the drain tank is normal, and whether the drain pump works normally.
4. The water temperature of the engine should not exceed 90°C to ensure the best performance of the heating device.