1, let's see if the fan has high speed first. You take a taxi for 30 minutes, wait until the water temperature rises above 80 degrees, and see the speed of the fan. If there is a high speed, it is not a fan failure. If there is no high speed, the temperature control switch is aging or damaged and should be replaced.

2, the water tank is too stolen. First unplug the hose at the outlet of the water tank, start the car and see if the water at the outlet is dirty. If it is too dirty, clean the water tank; if not, check the water pump.

3. If all the above are all right, it is that the fan motor is aging or burnt out.

This is a common problem. I hope I can help you solve it. I'm a maintenance worker.