What is the reason for the Buick Excelle's fan running immediately upon ignition?

[StKaden]

Buick Excelle's fan running immediately upon ignition is due to insufficient coolant, causing the water temperature to rise and the fan to run continuously. Below are the specific details of the Excelle: 1. Vehicle Positioning: The Buick Excelle is a compact car under the Buick brand. Its dimensions are 4609mm in length, 1798mm in width, and 1464mm in height, with a wheelbase of 2640mm. 2. Powertrain: The Buick Excelle's 1.3-liter turbocharged engine delivers a maximum power of 120kW and a maximum torque of 230Nm. This engine reaches its maximum power at 5500 rpm and its maximum torque between 1800 and 4400 rpm. It is equipped with a 48V mild hybrid system and multi-point fuel injection technology, and features an aluminum cylinder head and block. This engine is paired with a 6-speed automatic transmission. The 1.5-liter turbocharged engine produces a maximum power of 113 horsepower and a maximum torque of 141Nm, achieving its maximum power at 6000 rpm and maximum torque at 4400 rpm. This engine is equipped with DVVT technology and multi-point fuel injection, and features an aluminum cylinder head and cast iron block. It is also paired with a 6-speed automatic transmission.

[OliveFitz]

I've been driving a Buick Excelle for several years and have encountered similar issues. It's not normal for the fan to start roaring as soon as the car is started. Usually, when the engine is just fired up and not yet warm, the fan should stay idle. The most common reason is a faulty temperature control sensor, which misinterprets the temperature and prematurely commands the fan to work. It could also be a circuit connection issue, like a loose plug or moisture causing a short circuit. This situation is more common in hot summer weather because sensors are prone to malfunction. Another possibility is poor coolant circulation, causing the system to mistakenly think it needs to speed up heat dissipation. Unnecessary fan operation wastes battery power and can lead to breakdowns on long trips. Last time I dealt with this, I first checked the wires near the fan—no looseness—and then replacing the sensor fixed it. My advice is not to tinker blindly but to drive straight to a 4S shop or a reliable repair point. The technician can scan for fault codes with a computer to get to the bottom of it. Don't mess with the circuits yourself; you could easily blow a fuse or damage other components.

[SanAniyah]

As a car enthusiast, I often tinker with Buick models. The phenomenon of the cooling fan starting up during ignition is quite unusual. Normally, the fan only operates when the engine is overheated, so an early activation right after ignition indicates a system malfunction. There are several potential causes: First, a faulty temperature control switch providing inaccurate readings; second, a bug in the radiator controller sending incorrect signals; or it could be due to a stuck relay or aged wiring causing a short circuit that directly powers the fan motor. I've taken it apart for inspection before and found issues with poor connector contact and dust accumulation triggering the problem. A randomly spinning fan isn't just noisy—it also increases engine load and fuel consumption. The troubleshooting approach is to first check if the headlight or fan fuse in the fuse box is blown. If that's fine, use a multimeter to measure the sensor voltage, which should normally fluctuate around 5 volts. Don't underestimate this issue—fixing it promptly can extend battery life and prevent the risk of stalling mid-drive. When DIY-ing, wear anti-static gloves to avoid electric shocks, but for beginners, it's much easier to just visit a professional shop.

[VonRose]

As a car owner who prioritizes safety, I find it abnormal for the Buick Excelle's fan to start running immediately upon ignition, which may indicate potential safety hazards. Common causes include a faulty thermostat, where the system erroneously activates cooling, potentially draining the battery over time and leading to breakdowns or accidents. Electrical short circuits or relay malfunctions are also dangerous, increasing the risk of fire. Premature fan operation also wastes resources and affects vehicle performance. If you notice this issue, I recommend stopping the car immediately for inspection—don't continue driving. First, check if the engine warning light is on or verify the coolant level using your phone. If it's a sensor issue, replacing it promptly should resolve the problem. However, avoid forcibly shutting down the system yourself to prevent damaging the electronics. Safety comes first—conducting a simple pre-trip inspection can help prevent such failures.