What are the reasons why the hood of the Tiguan automatically pops open and cannot be closed?

[LeFelicity]

The reasons why the hood of the Tiguan automatically pops open and cannot be closed are as follows: 1. Insufficient coolant: Prolonged water circulation during engine operation can cause the coolant in the engine cooling system to gradually deplete, leading to a lack of water in the radiator. If the owner fails to promptly inspect and replenish the coolant, it can easily result in engine overheating, causing the hood to automatically pop open. 2. Cooling fan malfunction: A damaged cooling fan or a short circuit in the wiring can cause the fan to malfunction or operate at a slow speed, preventing the engine's heat from dissipating. This naturally raises the engine temperature, causing the hood to automatically pop open. 3. Thermostat failure: The thermostat is a device that controls the flow path of the coolant. If it becomes stuck or fails, the engine's large and small circulation cycles will inevitably be affected, preventing the engine's heat from being effectively dissipated. 4. Water pump failure: If the water pump malfunctions, the water that conducts heat in the engine cannot circulate and renew in time. As a result, the water temperature will rise rapidly after the engine starts, and the water temperature warning light on the dashboard will illuminate.