1. Open the front cover and find the heater water tank under the front bumper.
2. Remove the plastic screws at the bottom of the water tank with a small wrench or flat pliers, remove the hook at the bottom of the water tank, and take out the bottom filter screen.
3. Wash the filter screen at the bottom with a water gun or faucet to clean the impurities and dust on the filter screen.
4. Check whether there are sundries and dust in the water tank. If there is, take it out by hand or pliers.
5. Put the bottom filter back into the water tank, and reinstall the bottom hook and plastic screws of the water tank.
6. Close the front cover, start the vehicle and check whether the warm air is discharged normally.