Why does the car's water temperature rise so slowly?

[MacCaroline]

The slow rise in car water temperature is caused by a damaged thermostat or the cooling fan running constantly. The thermostat operates based on the engine's water temperature. If the thermostat malfunctions and the valve fails to close, the coolant will continuously circulate in the large loop, potentially causing the engine's water temperature to remain too low. The water temperature refers to the temperature of the antifreeze, which is a coolant with anti-freezing properties. It prevents the coolant from freezing and expanding in cold winter conditions, which could crack the radiator or damage the engine cylinder block or head. The method for replacing antifreeze is as follows: 1. Open the vehicle's engine hood, and you can see the coolant reservoir in the upper right corner; 2. Open the antifreeze drain plug under the radiator to drain the old antifreeze; 3. Add new antifreeze, tighten the cap, and the antifreeze replacement is complete.