What are the reasons for low coolant temperature?

[Jasper]

The reasons for low coolant temperature are: 1. Faulty water temperature gauge and wiring; 2. Damaged water temperature sensor; 3. Thermostat valve stuck open; 4. Louvers unable to close; 5. Faulty temperature control switch or fan motor wiring; 6. Malfunctioning silicone oil clutch in vehicles equipped with silicone oil clutch fans. The functions of coolant are: 1. To prevent freezing and expansion of coolant in cold seasons, which could crack the radiator and damage the engine cylinder block; 2. To prevent corrosion of metal parts and aging of rubber components; 3. To reduce scale formation, avoiding blockage of circulation pipes and affecting the cooling system's heat dissipation function; 4. To prevent the engine from overheating, ensuring it operates at the proper working temperature; 5. To provide lubrication for the water pump, thermostat, and other components.

[DeAlessandra]

I ran into this issue just the other day - the coolant temperature on the dashboard wouldn't rise while driving, which was really annoying. After checking carefully, the main cause was a stuck thermostat that didn't close properly, allowing coolant to keep circulating in the main loop, preventing temperature from increasing. Also, if it's extremely cold outside, like driving in deep winter, the engine warms up slower and this phenomenon can occur. Additionally, if the temperature sensor is faulty, the readings might show low temperatures. It's important to check these areas promptly because low temperatures affect fuel consumption - the car drinks gas like crazy - and causes greater engine wear. Over time, repair costs will skyrocket. I've developed the habit of regularly checking coolant levels to prevent small issues from becoming major headaches and avoid breakdowns on the road.

[DelJameson]

As a veteran driver with ten years of experience, I believe low coolant temperature is usually caused by some common issues. First, a faulty thermostat is the most frequent culprit—it fails to close properly when it should, allowing coolant to flow too quickly and slowing down the temperature rise. Second, insufficient or degraded coolant levels can also lead to abnormal temperature readings. Third, a malfunctioning fan system might be the problem, such as the fan running continuously and dissipating too much heat. If you notice low temperatures, address it promptly. Prolonged operation without proper warm-up increases emissions, which is neither eco-friendly nor fuel-efficient. I recommend warming up the car for a few minutes before long drives in cold weather and performing a quick seasonal check to prevent issues. Don’t wait until the car breaks down, wasting money and causing traffic jams.

[SanAdam]

I have summarized several key points regarding the causes of low coolant temperature: A faulty thermostat can disrupt fluid circulation and maintain low temperatures; prolonged engine warm-up time in cold external environments; insufficient or aged coolant affecting system functionality. Additionally, a damaged temperature sensor may display incorrect readings. These minor issues can be easily fixed, but quick action is required—prolonged low temperatures increase wear and shorten engine lifespan. Remember, regular maintenance checks on fluid levels and component conditions are crucial for peace of mind.