There are four reasons why the automobile air conditioner does not heat, and each reason will lead to the air conditioner not heating. The heater water tank is blocked, the circulation valve and power valve are out of order, the cooling system has air resistance, and the cooling liquid can't reach the working value of the air conditioner heater.
The solution is as follows:
1, the heating water tank is blocked. Try to remove the two pipes of the heating water pipe and let the compressed air blow through the heating water tank.
2. If the circulation valve and power valve fail, replace the circulation valve and flow valve.
3. There is air resistance in the cooling system, so it is necessary to exhaust air resistance.
4. The coolant can't reach the working value of the air conditioner heater, so it is necessary to wait for the car to run for a period of time before using the air conditioner.
If the above four reasons and four methods can't solve the problem, we need to send the car to the garage for repair.