How to Read the Water Temperature Gauge in a Car?
2 Answers
Car water temperature gauges are marked with two letters, C and H, or use white and red zones to differentiate. C stands for Cold, and H stands for Hot. If the water temperature gauge approaches the H mark or the red danger zone, the water temperature warning light may illuminate, indicating that the engine coolant temperature is too high. Possible reasons for an increase in car water temperature include: 1. Poor engine cooling, such as when a small-displacement car is climbing a hill with the air conditioning on during summer, increasing the engine load. 2. Long-term use without cleaning the internal and external dirt of the radiator, affecting the coolant circulation and heat dissipation. 3. Fan damage or failure of other cooling components, preventing timely assistance in radiator cooling.
Keep an eye on the coolant temperature gauge while driving. It usually has 'C' and 'H' markings on the dashboard. When starting a cold engine, the needle points near 'C', and should stabilize in the middle zone once the engine warms up—this indicates normal operating temperature, typically around 90 to 100 degrees Celsius. If the needle gradually drifts toward the 'H' end or red zone, it means the engine is overheating. Immediately find a safe place to stop, turn off the engine, and inspect it. Continuing to drive could lead to engine seizure or severe damage, and repairs won’t come cheap. Possible causes include low coolant levels, radiator leaks, or a malfunctioning fan. Before driving, glance at the gauge to ensure the needle rises to the middle zone smoothly after startup without erratic movements. Remember to regularly check the antifreeze level—if it’s below the 'min' line, top it up promptly to prevent minor issues from escalating into major safety hazards.
