What is the reason for the constant rotation of the Besturn B50 fan?
3 Answers
The reasons for the constant rotation of the Besturn B50 fan are: 1. High engine water temperature; 2. Incorrect signal from the electric fan temperature sensor; 3. Fault in the cooling fan controller. The vehicle needs to be inspected to determine the cause of the fault, which can be divided into two aspects: cooling system fan control and coolant circulation system. The Besturn B50 is a compact sedan manufactured by FAW Besturn. Its body dimensions are 4695mm in length, 1795mm in width, and 1460mm in height, with a wheelbase of 2725mm. The front suspension of the car is a double-wishbone independent suspension with a stabilizer bar, and the rear suspension is a multi-link independent suspension.
When I was driving my Besturn B50, the fan kept running non-stop, which really gave me a headache. Common causes include a faulty coolant temperature sensor, which falsely signals high temperature and keeps the fan running; or a stuck thermostat that fails to open, blocking coolant circulation; it could also be due to insufficient coolant leading to poor cooling efficiency. In my case, the issue was an aging sensor, and replacing it fixed the problem. I suggest you first check the coolant level and top it up if necessary, then see if the engine temperature is abnormally high. If the fan runs even when the engine is cold at startup, it’s likely due to a stuck relay or a short circuit in the wiring. Don’t delay fixing it to avoid engine overheating damage. Regular maintenance like periodic coolant changes and checking connection points can prevent such troubles, saving you money and hassle.
I was quite startled when the fan kept running constantly shortly after I bought my Besturn B50. After some research, I learned several possible causes: for instance, coolant leakage preventing heat dissipation, a faulty thermostat obstructing normal flow, or a stuck fan control relay keeping the circuit continuously closed. Checking it myself was simple—after turning off the car, I inspected whether the radiator fluid level was above the MIN line; if not, I topped it up with coolant. If that didn’t work, it might be due to a faulty temperature sensor or aged wiring causing a short circuit—scanning for trouble codes with a phone is convenient. Addressing it promptly avoids wasting battery power and worsening fuel consumption; fixing minor issues early is more cost-effective. Remember safety: never open the hood while the engine is hot to prevent burns.
