1. Check if there is a water leak. 2. The water tank or water pipe is blocked. Clean the water tank and water pipe. 3. Adjust the tension of the water pump belt and fan belt. or air leaks from the seal. 5. Power Oil time is incorrect, 6. There is too little oil, 7. The sensor cap and water temperature meter are defective.
There should be no liability. You may feel uncomfortable, but it's true. This should also be the responsibility of the driver. It is normal not to add refrigerant. Simply drain the water every day once it reaches 0 degrees. Proactive service is carried out 5 times a year, and it hasn't been a year now. Also, as long as it is not a break in the oil passage, it is possible to use AB glue, I have also encountered it