Solutions for BYD F3's False High Water Temperature?

[AryaDella]

Due to the mixing of the combustion chamber and water channel, water may drain from the discharge pipe under such circumstances, or white smoke may be emitted, which naturally leads to frequent water shortage in the radiator. One phenomenon is that the engine oil turns white due to water presence, and another scenario is the mixing of water channels, which results in poor heat dissipation in the car's cylinder block. The car's impeller may slip or become completely stuck, causing the belt to break. Another situation is impeller deformation. Both can lead to excessively high engine water temperature. In such cases, it's advisable to realign the belt or replace the impeller.

[IsabelLee]

When driving my BYD F3, I've also encountered situations where the coolant temperature gauge displayed falsely high readings. This is quite common and is usually caused by a faulty coolant temperature sensor, which sends signals to the dashboard. If it's dirty or damaged, the readings may be inaccurate. First, check if the coolant level is sufficient. If it's below the MIN line, top it up with the appropriate antifreeze. Another culprit could be the thermostat – sometimes it gets stuck and fails to open, causing the actual temperature to remain low while the gauge shows high readings. Is the radiator dirty? Blockages can prevent heat dissipation and lead to false readings. In my case, cleaning the sensor connector with carburetor cleaner solved the issue. If the problem persists, it's advisable to check the electrical circuit or the cooling fan. If the fan isn't spinning, the temperature control switch might be faulty. In short, don't rush to replace parts. Start with basic maintenance, such as checking the radiator cap seal, as leaks in the cooling system can also cause false high readings. It's best to visit a professional workshop to read the fault codes with a diagnostic tool to confirm whether it's an instrument cluster issue or actual overheating. Safety first – if the gauge shows a false high reading, drive slowly, turn on the AC to maximum, and use the heater to assist with cooling. Don't take risks while driving.

[JoelLynn]

I have some experience dealing with false high coolant temperature. First, turn off the engine and let it cool down for a while, then open the radiator cap to check the coolant level. If it's too low, add the same type of antifreeze. Next, inspect the coolant temperature sensor, usually located at the top of the engine. Unplug the connector and clean the copper contacts. For the thermostat, check if it's aged or stuck. Remove it and test its opening and closing temperature in hot water. The thermostat for a BYD F3 should open at around 85°C. Is the radiator fan working? Turn the key to the ON position without starting the engine, and the fan should automatically activate after a few minutes. If it doesn't, check the fuse or relay. There might be corrosion or loose connections in the wiring; using a multimeter to test continuity is the most reliable method. Regularly use cooling system cleaners during maintenance to prevent dirt buildup. If all else fails, replace the original sensor—it only costs a few dozen yuan—and avoid using cheap aftermarket parts. Remember, if the coolant temperature appears falsely high, don't push it; stop and inspect to reduce engine strain.

[JosiahLynn]

From my perspective, the analysis points to principle-induced false high readings. The BYD F3's coolant temperature sensor collects engine temperature signals and transmits them to the dashboard. Signal deviations often occur due to dirt interference or poor contact, leading to false readings. Similarly, inadequate coolant circulation—such as when the thermostat fails and gets stuck in a slightly open position—results in low heat exchange efficiency but shows abnormally high readings on the gauge. Insufficient or deteriorated coolant reduces heat dissipation, exacerbating false alarms. Solutions include visually checking the coolant level and replenishing it with the appropriate ratio of antifreeze, replacing aged thermostats to ensure normal opening around 88°C, and installing new sensors matching OEM parameters if cleaning proves ineffective. Additionally, inspect relays and fuses to ensure the fan circuit is powered, as non-functional fans lead to heat accumulation and false temperature spikes. Regular cooling system maintenance is crucial to prevent such issues.