It will affect the heat dissipation capacity of the vehicle, and even cause the engine to boil. The symptoms of VW Lavida thermostat failure are as follows: 1. The thermostat is faulty. The thermostat is opened too small, and the large and small cycles of the engine are affected. The engine heat cannot be effectively dissipated. The engine water temperature rises, and the water temperature alarm light is on; 2. If the thermostat is opened too large, the engine water temperature will be too low, the water temperature will rise slowly, the fuel consumption will increase, and the engine will make abnormal noise; 3. The thermostat is stuck, which is easy to form carbon deposits
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