Audi A6L
The air conditioner is hot and cold. What's wrong? In this case, we can solve this problem through the troubleshooting process.
The reason why A6L air conditioner is hot and cold has been solved.
1. The heater water tank is blocked.
Solution: Check whether the temperature difference between the inlet and outlet pipes in front of the heater box is large. If this is the case, it must be that the heater tank is blocked. At this time, it is necessary to remove and replace the heater tank to solve the problem. The reason for this failure is generally because antifreeze is not replaced for a long time.
2, warm air water valve failure or air conditioning control panel circuit failure.
Solution: Turn off the fire, control the two control lines of the main driver and the co-pilot, with a ground wire in the middle (only when we turn on the air conditioner, the control line will have a positive pole), connect the control line of the main driver or the co-pilot, and check whether the relay and fuse work normally. If the positive pole is short-circuited, the car heater water valve will fail and need to be repaired or replaced.
If the air conditioning control panel is short-circuited to the positive pole, replace or repair the air conditioning control panel.
3. Poor heat dissipation of condenser
Solution: The main function of the cooling fan is to cool the water tank and condenser. If the cooling fan is used for a long time, the carbon brush and the position in contact with the rotor will be worn. If its speed is not enough, it will lead to poor cooling of condenser and water tank. If the carbon brush or rotor is not replaced in time, the cooling fan will not work normally, resulting in poor cooling of the condenser and the phenomenon that the air conditioner is not cooled.