What is broken when the Haval H6 electric fan keeps running?
4 Answers
Haval H6 electric fan keeps running due to a faulty thermostat. Because of the thermostat issue, the temperature cannot send water to the radiator even when it reaches the baseline temperature, or the water flow is insufficient, causing the engine to overheat and the electric fan to run continuously. The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature, changing the water circulation range to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within the appropriate temperature range. In terms of configuration, this vehicle features full-vehicle FOTA upgrades and supports ultra-autonomous driving, equipped with multiple intelligent driving assistance functions such as full-scenario automatic emergency braking, 50-meter fully automatic tracking reverse, and intelligent evasion.
The electric fan running continuously is a common issue on my Haval H6, and I've encountered it several times. It's usually related to a stuck thermostat, which controls the coolant flow. If it's stuck in the closed position, the engine temperature isn't high, but the system mistakenly thinks it's overheating, causing the fan to spin wildly. Another major possibility is a faulty coolant temperature sensor, which sends incorrect signals to the control unit, making the fan run non-stop. A shorted or stuck fan relay can also cause similar symptoms. Low coolant levels may trigger the fan to run due to a false overheating signal. For diagnosis, the first step is to check if the coolant level is within the normal range, then drive for a few minutes and use an OBD tool to read the coolant temperature data—if it exceeds 90°C and the fan still doesn't stop, there's a problem. Delaying repairs poses significant risks, such as quickly draining the battery or burning out the fan motor, leading to costly repairs. Focus on checking these components during repairs. Regular system inspections and maintenance can reduce the likelihood of this issue—don't wait until it becomes a major repair.
My H6's fan keeps running non-stop and it's driving me crazy. Even after shutting down the engine on the highway, it should stop but continues to buzz loudly. There could be several reasons: the thermostat might be stuck and unable to shut off the coolant flow, making the fan think the engine is still hot even when it's not; the water temperature sensor could be giving false readings due to aging or drift, misleading the control module; or the relay contacts might be stuck short-circuiting, automatically completing the circuit. A common approach is to first check if the coolant reservoir is empty or leaking, refill it and test, or see if a blown fuse is affecting the signal line, though that's rare. I remember once I fixed it myself by replacing a sensor, which cost just a few bucks and was an easy fix. If left unaddressed, the fan running continuously will accelerate wear and waste the battery's lifespan, eventually making it hard to start. Regular maintenance, like cleaning dust and debris from the radiator surface, can prevent overheating and abnormal fan behavior.
The continuous running of the fan is quite alarming. In my Haval H6, this behavior suggests potential cooling system issues such as a stuck thermostat failing to close properly, sending false overheating signals, or a malfunctioning coolant temperature sensor issuing erratic commands. A short-circuited relay could also force the fan to operate non-stop. This may lead to rapid battery drain, premature fan wear, and even a high risk of engine damage due to overheating. Immediately check if the coolant level is normal and free from leaks, and seek professional diagnostics to ensure safety. Never ignore minor issues that could escalate into major problems.
