Why is the Chery QQ3 heater water tank leaking and the water temperature gauge rising and falling?

Chery qq1.1's heater water tank leaked recently and the water temperature gauge went up and down.

Your question is about the vehicle heater system. There are two reasons for water leakage in small water tanks. First, the water tank itself is aging. Second, the water temperature is too high, which causes excessive pressure in the water circulation system, causing water leakage. The engine water temperature gauge fluctuates up and down because air enters the water circulation system. Find and solve the cause of the water leakage and replenish the antifreeze. This should solve the problem.

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