Why Does the Car's Water Temperature Gauge Not Rise in Winter?

[VonAndrew]

In winter, if the car's water temperature gauge does not rise, it is likely due to a faulty thermostat or the radiator fan running continuously. When there is a circuit malfunction, the electric fan may run continuously. Additionally, a damaged silicone oil clutch can also cause the fan to run non-stop. These factors can prevent the water temperature from rising. The related explanations are as follows: 1. The thermostat in a car functions like a valve. It is typically installed at the outlet of the radiator, which is the inlet of the water pump. During operation, when the coolant temperature is low, the thermostat blocks the low-temperature coolant from the radiator, allowing the engine's water temperature to rise quickly. 2. When the engine's water temperature reaches a certain level, the valve gradually opens, and the coolant from the radiator starts circulating again. If the thermostat malfunctions and the valve fails to close in time, the coolant remains in a state of large circulation. Under such conditions, the engine's water temperature will not rise.